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Robertson, R. (1978). Spermatophores of six eastern North American Pyramidellid gastropods and their systematic significance (with the new genus Boonea). Biological Bulletin. 155 (2): 360-382.
Robertson, R. (1978). Spermatophores of six eastern North American Pyramidellid gastropods and their systematic significance (with the new genus Boonea). Biological Bulletin. 155 (2): 360-382.
