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Grasshoppers, Locusts, Crickets, Cockroaches, Etc. of Minnesota

University of Minnesota. Agricultural Experiment Station

出版	University of Minnesota, Agricultural Experiment Station, Entomological Division, 1897
URL	http://books.google.com.hk/books?id=v0y8LJwzHscC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN