Trees of Minnesota, how to know them ;
a pocket manual.
APA Citation
Minnesota. Department of Conservation. (1952). Trees of Minnesota, how to know them: a pocket manual. 4th rev. ed. St. Paul.
MLA Citation
Minnesota. Department of Conservation. Trees of Minnesota, How to Know Them: a Pocket Manual. 4th rev. ed. St. Paul, 1952.
Warning: These citations may not always be complete (especially for serials).