Singh, A. P. (1989). Himalayan environment and tourism: Development and potential. Chugh Publicatons.
Chicago-viite (17. p.)Singh, Arun Pratap. Himalayan Environment and Tourism: Development and Potential. Allahabad: Chugh Publicatons, 1989.
MLA-viite (9. p.)Singh, Arun Pratap. Himalayan Environment and Tourism: Development and Potential. Chugh Publicatons, 1989.
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