TY  - BOOK
AU  - Kothari, C.R
TI  - Research methodology : methods and techniques .-2nd rev ed .-978-81-224-1522-3
SN  - 978-81-224-1522-3
U1  - 307.2 Kot 
PY  - 2004///
CY  - New age international, New Delhi
ER  -