Principles of environmental conservation /
Singh, H. S.
Principles of environmental conservation / H. S. Singh, - Dehra dun : International book distibutors, c1989. - Verious paging. : ill. ; 25 cm.
Includes bibliographies.
8770891019
Environmental.
333.7 / SIP
Principles of environmental conservation / H. S. Singh, - Dehra dun : International book distibutors, c1989. - Verious paging. : ill. ; 25 cm.
Includes bibliographies.
8770891019
Environmental.
333.7 / SIP