Die Hilarius-Fragmente.

Thesis (doctoral)--Kgl. Universitat Breslau.

Essentials of bacteriology; being a concise and systematic introduction to the study of micro-organisms,

Mode of access: Internet.

Potash & Perlmutter; their copartnerhip ventures and adventures,

Mode of access: Internet.

North American Cariceae /

Descriptive text on versos facing plates.

Status of waterfowl in 1934 /

Contributon from Bureau of Biological Survey.