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Google圖書搜尋
Clear-span Roof Construction
Merle L. Esmay
James S. Boyd
Burton F. Cargill
出版
Michigan State University, Cooperative Extension Service, Department of Agricultural Engineering
, 1962
URL
http://books.google.com.hk/books?id=r5qztwAACAAJ&hl=&source=gbs_api