SS Negi. (1982). Geology for foresters. Bishen Singh Mahendra Pal Singh.
Čikaški stil citiranjaSS Negi. Geology for Foresters. Dehra Dun: Bishen Singh Mahendra Pal Singh, 1982.
MLA način citiranjaSS Negi. Geology for Foresters. Bishen Singh Mahendra Pal Singh, 1982.
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