Chhatwal, G. R. text New Delhi Anmol Publications 1994 monographic 12 v. ; v 1. 250 ; v 2. 251-310 ; v 3.311-548 ; v 4.1-314 ; v 5. 325 ; v 6. 326-620 ; v 7. 280 ; v 8. 281-547 ; v 9. 548-764 ; v 10.766- 982 ; v 11. 284 ; v 12. 286-576p ) 22cm. edited by G. R. Chhatwal 12 v. ; v 1. History of science ; v 2. History of biology ; v 3. History of biology ; v 4. History of chemistry ; v 5. History of mathematics and computer science ; v 6 History of mathematics and computer science ; v 7. History of physics ; v 8. History of physics ; v 9. History of physics ; v 10. History of physics ; v 11. History of technology ; v 12. History of Technology Science -- History -- Encyclopedias Technology -- History -- Encyclopedias 509 ENC 8170418453 A-702046 Cen Lib/Ret DPL EN