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The House Fly and How to Suppress It
U. S. Department of Agriculture Farmers' Bulletin No. 1408

written by "Bishopp, F. C. (Fred Corry), 1884-1970"
...filled with water to a depth of 1 inch in the shallowest part. Flies will lay their eggs on the manure as usual, but the maggots, when they have finished feeding and begin to migrate, crawl out of t... read more