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Google圖書搜尋
The Pear-slug, Caliroa Cerasi Linn., Eriocampoides Limacina Retz
Robert Lorenzo Webster
出版
Agricultural Experiment Station, Iowa State College of Agriculture and the Mechanic Arts
, 1912
URL
http://books.google.com.hk/books?id=JC4nAQAAMAAJ&hl=&source=gbs_api