00574cam a22002171 4500 sa 63003046 DLC 20260227111939.0 780602s1962 ii 000 0 eng sa 63003046 (OCoLC)3947644 DLC NGenoU DLC premarc Z696 .D895 Dutta, Dwijendranath, 1920- Library classification theory & practice. [1st ed.] Nagpur, Western Book Depot, 1962. 320 p. 19 cm. Classification Books. 54873 54873