00000nam a2200000 a 4500 20251203090557.0 8185009309 020 VIS Viswanathan, CG. Elements of information science and technology 2nd ed. Lucknow Print house 1986 ix,119 p. 22 cm. HB Library science Information science and technology eng _ 11506 C 12571 12571 0 0 0 0 PU PU 1998-04-08 0 020 VIS 11506 BK