APA

Pohl R. W., . (1954). How to know the grasses: pictured-keys for determining the common and important American grasses, with suggestions and aids for their study. Dubuque, Iowa: W. C. Brown Co.

Chicago

Pohl Richard Walter, . 1954. How to know the grasses: pictured-keys for determining the common and important American grasses, with suggestions and aids for their study. Dubuque, Iowa: W. C. Brown Co.

Harvard

Pohl R. W., . (1954). How to know the grasses: pictured-keys for determining the common and important American grasses, with suggestions and aids for their study. Dubuque, Iowa: W. C. Brown Co.

MLA

Pohl Richard Walter, . How to know the grasses: pictured-keys for determining the common and important American grasses, with suggestions and aids for their study. Dubuque, Iowa: W. C. Brown Co. 1954.