Nikhil Mohan Pattnaik, & Nikhil Mohan Pattnaik; Puspashree Pattnaik. (2004). Exploring Nature: A guidebook on activity based nature study. New Delhi: Vigyan Prasar.
Chicago-tyylinen lähdeviittausNikhil Mohan Pattnaik, ja Nikhil Mohan Pattnaik; Puspashree Pattnaik. Exploring Nature: A Guidebook On Activity Based Nature Study. New Delhi: Vigyan Prasar, 2004.
MLA-viiteNikhil Mohan Pattnaik, ja Nikhil Mohan Pattnaik; Puspashree Pattnaik. Exploring Nature: A Guidebook On Activity Based Nature Study. New Delhi: Vigyan Prasar, 2004.
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