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MLA

Diehl, H. C. (Helmut Charles). "The Frozen-pack Method of Preserving Berries In the Pacific Northwest." , p.. Print

APA

Diehl, H. C. (Helmut Charles). (1930). The Frozen-pack method of preserving berries in the Pacific Northwest.

Chicago

Diehl, H. C. (Helmut Charles) "The Frozen-pack method of preserving berries in the Pacific Northwest" (0000): p..