Precision Orbit of δ Delphini and Prospects for Astrometric Detection of Exoplanets von Gardner, Tyler, Monnier, John D., Fekel, Francis C., Williamson, Mike, Duncan, Douglas K., White, Timothy R., Ireland, Michael, Adams, Fred C., Barman, Travis, Baron, Fabien, Brummelaar, Theo ten, Che, Xiao, Huber, Daniel, Kraus, Stefan, Roettenbacher, Rachael M., Schaefer, Gail, Sturmann, Judit, Sturmann, Laszlo, Swihart, Samuel J., Zhao, Ming

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A Study of General Education Astronomy Students' Understandings of Cosmology. Part V. The Effects of a New Suite of Cosmology Lecture-Tutorials on Students' Conceptual Knowledge von Wallace, Colin S., Prather, Edward E., Duncan, Douglas K.

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Improving Student Attitudes about Learning Science and Student Scientific Reasoning Skills von Duncan, Douglas K, Arthurs, Leilani

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A Study of General Education Astronomy Students' Understandings of Cosmology. Part III. Evaluating Four Conceptual Cosmology Surveys: An Item Response Theory Approach von Wallace, Colin S, Prather, Edward E, Duncan, Douglas K

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Digital Devices, Distraction, and Student Performance: Does In-Class Cell Phone Use Reduce Learning? von Duncan, Douglas K, Hoekstra, Angel R, Wilcox, Bethany R

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A Study of General Education Astronomy Students' Understandings of Cosmology. Part IV. Common Difficulties Students Experience with Cosmology von Wallace, Colin S, Prather, Edward E, Duncan, Douglas K

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A Study of General Education Astronomy Students' Understandings of Cosmology. Part II. Evaluating Four Conceptual Cosmology Surveys: A Classical Test Theory Approach von Wallace, Colin S, Prather, Edward E, Duncan, Douglas K

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A Study of General Education Astronomy Students' Understandings of Cosmology. Part I. Development and Validation of Four Conceptual Cosmology Surveys von Wallace, Colin S, Prather, Edward E, Duncan, Douglas K

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The chromospheric emission-age relation for stars of the lower main sequence and its implications for the star formation rate von SODERBLOM, D. R, DUNCAN, D. K, JOHNSON, D. R. H

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Ca II H and K measurements made at Mount Wilson Observatory, 1966-1983 von Duncan, Douglas K., Wilson, Olin C., Preston, George W., Frazer, James, Vaughan, Arthur H.

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Boron Abundances and Internal Mixing in Stars. I. The Hyades Giants von Duncan, Douglas K, Peterson, Ruth C, Thorburn, Julie A, Pinsonneault, Marc H

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Small mammal inventory of Chiricahua National Monument, Cochise County, Arizona / by Douglas K. Duncan von Duncan, Douglas K

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The abundance of boron in three halo stars von Duncan, Douglas K., Lambert, David L., Lemke, Michael

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The evolution of the lithium abundances of solar-type stars. III - The Pleiades von Soderblom, David R., Jones, Burton F., Balachandran, Suchitra, Stauffer, John R., Duncan, Douglas K., Fedele, Stephen B., Hudon, J. D.

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Rotation of young solar-type stars in the Orion Nebula region von DUNCAN, D. K

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Evidence for a dispersion in the lithium abundances of extreme halo stars von Deliyannis, Constantine P., Pinsonneault, M. H., Duncan, Douglas K.

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Time-resolved CCD photometry of an ensemble of stars in the open cluster M67 von GILLILAND, R. L, BROWN, T. M, DUNCAN, D. K, SUNTZEFF, N. B, WESLEY LOCKWOOD, G, THOMPSON, D. T, SCHILD, R.E, JEFFREY, W. A, PENPRASE, B. E

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Lithium in Young Solar-Type Stars in the Orion Nebula Region von Duncan, Douglas K., Rebull, L. M.

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The lithium abundance in halo stars von Hobbs, L. M., Duncan, Douglas K.

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Precision Orbit of $\delta$ Delphini and Prospects for Astrometric Detection of Exoplanets von Gardner, Tyler, Monnier, John D, Fekel, Francis C, Williamson, Mike, Duncan, Douglas K, White, Timothy R, Ireland, Michael, Adams, Fred C, Barman, Travis, Baron, Fabien, Brummelaar, Theo ten, Che, Xiao, Huber, Daniel, Kraus, Stefan, Roettenbacher, Rachael M, Schaefer, Gail, Sturmann, Judit, Sturmann, Laszlo, Swihart, Samuel J, Zhao, Ming

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