By Mevin W Hanna

Published by National Book Foundation, 1986

By Wichmann, Eyrind H

Published by McGraw Hill

By Francis Halzen and Alan D. Martin

Published by John Wiley and sons, 1984

By A. Belevtsev

Published by Meer Publishers, 1974

By John W. Twidell and Anthony D. Weir

Published by English L:anguage book society/oxford university p, 1987

By William G. Cochran

Published by Wiley Eastern Ltd., 1987

By Mir Muhammad Yaqub

Published by S. Book House, 1966

By Albert Paul Malvino

Published by Tata McGraw Hill publishing co. ltd., 1990

By Adir Bar-lev

Published by Prentice Hall of India Pvt. Ltd., 1987

By S.M.A.Kazmi

Published by Tata Mc Graw-Hill publishing Co. Ltd., 1988