Ojha , N. N. (2014). Ecology & environment: A comprehensive book based on the latest trends of civil services mains, PCS and similar other competitive examinations with full backgrounds, extremely useful for interview and essay papers. Chronicle Books.
Chicago Edition CitationOjha , N. N. Ecology & Environment: A Comprehensive Book Based on the Latest Trends of Civil Services Mains, PCS and Similar Other Competitive Examinations with Full Backgrounds, Extremely Useful for Interview and Essay Papers. Noida: Chronicle Books, 2014.
MLA Edition CitationOjha , N. N. Ecology & Environment: A Comprehensive Book Based on the Latest Trends of Civil Services Mains, PCS and Similar Other Competitive Examinations with Full Backgrounds, Extremely Useful for Interview and Essay Papers. Chronicle Books, 2014.