George H. Fried. (1995). Biology: A complete course with 900 questions and answers. New York: McGraw-Hill.
Παραπομπή Chicago StyleGeorge H. Fried. Biology: A Complete Course With 900 Questions and Answers. New York: McGraw-Hill, 1995.
Παραπομπή MLAGeorge H. Fried. Biology: A Complete Course With 900 Questions and Answers. New York: McGraw-Hill, 1995.
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