Radhakrishnan, M, et al. <br/><br/>
Vellam (m) / 
Radhakrishnan, M, et al. 
 -  State Institute of Languages, TVPM,  1974 
 - p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrogen and its compounds; Inorganic chemistry
<br/><br/><label>Dewey Class. No.: </label>546.2 RAD-V