Grimm, W. C. (1968). Recognizing flowering wild plants. Stackpole Books.
Lua i Stíl Chicago (17ú heag.)Grimm, William Carey. Recognizing Flowering Wild Plants. Harrisburg, Pa: Stackpole Books, 1968.
Lua MLA (9ú heag.)Grimm, William Carey. Recognizing Flowering Wild Plants. Stackpole Books, 1968.
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