The early Paleozoic Bryozoa of the Baltic provinces /
Bassler, Ray S. b. 1878.
The early Paleozoic Bryozoa of the Baltic provinces / by Ray S. Bassler. - Washington : Govt. print. off., 1911. - XXI, 382 p. : ill. ; 25 cm. - Bulletin of the US National Museum .
The early Paleozoic Bryozoa of the Baltic provinces / by Ray S. Bassler. - Washington : Govt. print. off., 1911. - XXI, 382 p. : ill. ; 25 cm. - Bulletin of the US National Museum .