Simultaneous identification and quantitation of codeine, morphine, hydrocodone, and hydromorphone in urine as trimethylsilyl and oxime derivatives by gas chromatography-mass spectr... von Broussard, Larry A, Presley, Lance C, Pittman, Thomas, Clouette, Randy, Wimbish, Gary H

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Improved gas chromatography-mass spectrometry method for simultaneous identification and quantification of opiates in urine as propionyl and oxime derivatives von BROUSSARD, Larry A, PRESLEY, Lance C, TANOUS, Mike, QUEEN, Cecelia

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Alternative drug testing update von Presley, Lance C

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Genotypes of multiple allozyme loci interact with an experimental environment to affect survivorship in earthworms ( Eiseniaandrei) von McElroy, Thomas C, Presley, M.Lance, Diehl, Walter J

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Genotypes of Multiple Allozyme Loci Interact With an Experimental Environment to Affect Growth in Juvenile Earthworms (Eisenia fetida andrei) von McElroy, Tom C, Presley, M.Lance, Diehl, Walter J

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The effectiveness of several current soft contact lens care systems against Aspergillus von CONNOR, C. G, PRESLEY, L, FINCHUM, S. M, STEEL, S. A

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