Descripción
Notas:Part of the papers presented at a symposium held in Toronto, May 18th, 1964, organized by the Research Committee of the Society of Economic Paleontologists and Mineralogists, with several papers prepared especially for this work.
Descripción Física:v, 265 p. : il. ; 25 cm
Bibliografía:Incluye referencias bibliográficas (p. 253-265) e índice.