H. G. 'Mick' Callan (1917-93).
Department of Embryology, Carnegie Institution of Washington, Baltimore.
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D000663:Amphibians; D000818:Animals; D002875:Chromosomes / Q000648:ultrastructure; D003582:Cytogenetics / Q000266:history*; D004739:England; D049673:History, 20th Century; D009865:Oocytes / Q000648:ultrastructure; D014158:Transcription, Genetic