J S Gupta,  <br/><br/>
P C Ray 

 - New Delhi  National Book Trust  1900 
<br/><br/><label>Subjects--Uniform Titles: </label>--General Stack
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural Science & mathematics--Chemistry & allied scienceHistorical, geographical & persons treatmentGeneralia--Chemistry & allied science
<br/><br/><label>Dewey Class. No.: </label>540.92  / JSG-P