00000nam a2200000 a 4500 20251202164233.0 370.1 GHO Ghosh,BN Lectures on scientific methods New Delhi Sterling 1986 155 p. 24 cm Sscientific methods _ 6614 C 4441 4441 0 0 0 0 PU PU 1998-04-09 20.00 0 370.1 GHO 6614 BK