Antarctica WILLIAM R. HAMMER Department of Geology Augtistana College Rock Island / PAUL C. FITZGERALD Department of Geology Arizona State University Tempe / Royal Society of London / National Science Foundation / /
Person
Lystrosaurus Zone (Triassic) / WILLIAM R. HAMMER / J.W. Collinson / William J. Ryan / III / EDMUND STUMP / W.J. Ryan / III / /
Position
head / /
ProvinceOrState
Illinois / Arizona / /
PublishedMedium
Philosophical Transactions of the Royal Society / Natural History / /