By Dr. Cauvery & Others

Published by S. Chand & Company Limited, 2009

By G.C. Ramamurthy

Published by Dreamtech, 2012

By Uma Sekaran & Roger Bougie

Published by Wiley India Edition, 2012

By Muhammad Hameed Raja, Malik Zahir Faridi

Published by Abdullah Brothers, 0

By Nawaz Ahmad

Published by Azeem Academy, 0

By Late Murray R Spiegel, Larry J. Stephens & Narinde

Published by Tata McGraw Hill Education Private Limited, 2012

By Samir Dasgupta

Published by Pearson, 2012

By W. Lawrence Neuman

Published by Pearson India Education Services Pvt. Ltd., 2018

Published by Bearu of Statistics Government of the punjab, 1985

Published by Bearu of Statistics Government of the punjab, 1985