TY  - BOOK
TI  - Sugan vigyan vishavkosh: gyan vigyan ki pramanik tathyapooran aur naveentam jankaari sainkdo chitro sahit/edited by Baalkrishan
U1  - 503  B199S 
PY  - 1990///
CY  - Delhi
PB  - Ravinder press
ER  -