Gregory Clark

Measurement of gestational cocaine exposure: Sensitivity of infants' hair, meconium, and urine

Cathleen Callahan, Therese M. Grant, Peggy Phipps et al. · The Journal of Pediatrics · 1992 · 113 citations

Medicine, Pediatrics, Toxicology +12

Oratorical Culture in Nineteenth-Century America: Transformations in the Theory and Practice of Rhetoric

Gregory Clark, S. Michael Halloran · College Composition and Communication · 1995 · 67 citations

Humanities, History, Political Rhetoric +9

Analysis of Urinary Benzodiazepines Using Solid-Phase Extraction and Gas Chromatography-Mass Spectrometry

David A. Black, Gregory Clark, Virginia M. Haver et al. · Journal of Analytical Toxicology · 1994 · 55 citations

Pharmacy, Pharmaceutical Analysis, Pharmacology +10

Development of analogical reasoning in 4- and 5-year-old children

Patricia A. Alexander, Victor L. Willson, C. Stephen White et al. · Cognitive Development · 1989 · 47 citations

Education, Educational Psychology, Psychology +10

The Analysis of Cocaine and Benzoylecgonine in Meconium

Gregory Clark, I. Bruce Rosenzweig, Vidmantas A. Raisys et al. · Journal of Analytical Toxicology · 1992 · 43 citations

Medicine, Pharmacology, Toxicology +5