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Google圖書搜尋
100 Years Bulgarian Academic Books, 1869-1968
Académie bulgare des sciences
其他書名
Catalogue of the Books and Periodicals of the Bulgarian Academy of Agricultural Sciences in Bulgaria
出版
Publishing House of the Bulgarian academy of sciences
, 1969
URL
http://books.google.com.hk/books?id=0yKqzQEACAAJ&hl=&source=gbs_api