TY  - BOOK
AU  - Singh D M
AU  -  Singh J
TI  - Introduction to our earth and envorinment
T2  - Environment and Development Study Centre, Publication
U1  - U:(G:55), M8 D&W 
PY  - 1988///
CY  - Varanasi
PB  - EDSC          
KW  - Geography Irt Enviornment
ER  -