The diatom genus Actinocyclus in the western United States - Bradbury, J. Platt (John Platt); Krebs, William N. (Washington : United States Government Printing Office, 1995)
A. Actinocyclus (Bacillariophyta) species from lacustrine Miocene deposits of the western United States / by J. Platt Bradbury and William N. Krebs -- B. Geologic ranges of lacustrine Actinocyclus species, western United States / by William N. Krebs and J. Platt Bradbury
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Keywords: geologie; geology; bulletiny; information bulletins