Llandoverian Graptolites of the Northern Canadian Cordillera
Subtitle: Petalograptus, Cephalograptus, Rhaphidograptus, Dimorphograptus, Retiolitidae, and Monograptidae.
Contributors: Lenz, Alfred C., 1929-
Series: Life sciences contributions -- 130
Publisher: s.n
Published: 1982
Place of publication: S.l
Language: eng
Notes: 1