Bulletins of Indian industrial Research 

 - Delhi  Manager of publications          1939 
 - (No.14) vii,63p. App.p.41-p59.Bib:p60-63p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X9(MD72).2.N3, G9