Effects of Seasonal Fire, Bison Grazing and Climatic Variation on Tallgrass Prairie Vegetation von Coppedge, B. R., Engle, D. M., Toepfer, C. S., Shaw, J. H.

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Effects of seasonal fire, bison grazing and climate variation on tallgrass prairie vegetation von Coppedge, B.R, Engle, D.M, Toepfer, C.S, Shaw, J.H

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Life-Time Experiments upon the Problem of Optimal Calcium Intake von Van Duyne, F.O., Lanford, C.S., Toepfer, E.W., Sherman, H.C.

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