TY  - BOOK
AU  - Vyas,Harish Chandra.
TI  - Jansankhiya pradoshan aur pariyavaran
U1  - 574.52 
PY  - 1989///
CY  - New Delhi
PB  - Vidhya vihar
KW  - Pariyvaran
KW  - Pradoshan aur Pariyavaran
ER  -