Integrated resource study for conservation and management of Ropar wetland ecosystem, Punjab Verma, V. K. ; Chopra, Rajiv ; Sharma, P. K. ; Singh, Charanjit Abstract Publication: Journal of the Indian Society of Remote Sensing Pub Date: December 1998 DOI: 10.1007/BF02990797 Bibcode: 1998JISRS..26..185V