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Variations and relationships in the snakes of the genus Pituophis

Published in Bulletin of the United States National Museum, in 1940, in volume 175, pages 1-225

Created: 2011-06-03, modified: 2017-01-06

doi:10.5479/si.03629236.175.1

A descriptive catalog of the shore fishes of Peru

Published in Bulletin United States National Museum, in 1940, in volume 189, pages 1-530

Created: 2012-09-05, modified: 2014-05-03

doi:10.5479/si.03629236.189.1