By Fred C. Hess

Published by an imprint of Heinemann Professional publishing lt, 1987

By N.N.Greenwood and A. Earnshaw

Published by Pergamon press, 1986

By Dr.H.A.Kazmi

Published by Sh.Barkat Ali and sons, 1968

By Edited by Dr. H.A. Kazmi

Published by Sh, Basharat Ali and sons, 1967

By Dr.Khairat M Ibnerasa

Published by W.Pak Text book board, 0

By Edwin C G Markham

Published by Houhton mifflin Co, 0

By Graham Hill and John Holman

Published by Jayper Brothers, 1990

By Colin J. Suckling and others

Published by Universal Book Stall, 1989

By Harrycf Biddle

Published by Rand Mf Nally & Co, 0

By Biddle Bush

Published by Rand. Mc Nally and Co., 1948