Typical flies; a photographic atlas Pearce, Ethel Katharine, 1856- creator text book Cambridge University press 1921 1921
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ENG Diptera QL532 .P42 https://www.biodiversitylibrary.org/bibliography/23058 5456485 agr22000103 10.5962/bhl.title.23058 U.S. Dept. of Agr. Lib.