TY  - BOOK
AU  - Conard,Henry Shoemaker
TI  - How to know the mosses and liverworts: pictured-keys for determining many of the North American mosses and liverworts, with suggestions and aids for their study 
SN  - 0-697-04808-X
AV  - QK538 C65
PY  - 1956///
CY  - Dubuque, Iowa
PB  - W. C. Brown
ER  -