Author: Jasbir Singh
Publisher:Vishal Publications, Kurukshetra
Copyright:1976
Author: Chick, N.A.
Publisher:Charles Knight, London
Copyright:1974
Author: Law, Bimala Churn
Publisher:Ess Ess Publication, Delhi
Copyright:1976
Author: Mookerjee, Amalendu Prasad
Publisher:Minerva Publications, Calcutta
Copyright:1974
Author: Nath, R.
Publisher:Abhinav Publications, New Delhi
Copyright:1976
Author: Agarwal, R.N.
Publisher:Popular Prakashan, Bombay
Copyright:1976