Tiwari, Ganga Sagar <br/><br/>
Vishv sabhyata ka vaigyanik itihas / 
Ganga Sagar Tiwari 
 - Allahabad:  Lok Bharti Prakashan, 
 - 254p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Anc. History