The cultural heritage of India /  
Priyadaranjan Ray and S. N. Sen.  
 - 2nd rev ed.  
 - Calcutta :   The Ramakrishna Mission,   c1986.  
 - xix, 550 p. ;   25 cm.  
 -  vol 6.  .
<br/><br/><label>Subjects--Index Terms: </label>Science and technology in modern India.  Geology and Mining.  Astronomy.  
<br/><br/><label>Dewey Class. No.: </label>954  / CUL