By Dr.J.K.Junejo and Dr.O.P.Grag

Published by Laxmi Publication Pvt. Ltd., 0

By Dr.J.K.Junejo and Dr.O.P.Grag

Published by Laxmi Publication Pvt. Ltd., 0

By M.K.Jain and others

Published by Willey Eastern Ltd., 2002

By Vilas A.Tabhane and Savya Sachi

Published by S. Chand & Co. ltd., 1985

By Arthur Beiser

Published by McGraw Hill, 2003

By Paul G. Hewitt

Published by 14-Local Shopping Centre, Panchsheel Park, 2009

Published by Oxford University Press, 1985

By Hojn Daintith

Published by International book Production Ltd., 1981

By Valerieh Pitt

Published by Benguin Books, 1986

By J.R.Nowicki, & L.J.Adam

Published by Edward Arblld, 1990