Congress proceedings:  21st International Geogrphical Congress / 
invited by the Indian National Committee for Geography of the International Geographical Union,held in New Delhi, December,1968; edited by S. P. Das Gupta 
 - Calcutta :  National Committee for Geography,  1973 
 - [30], 391p. :  ill. ;  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cartography--Congresses<br/>Geography--Congresses