edited by J R Ainsworth Davis [et al] <br/><br/>
Encyclopaedia of scientific developments inventions & discoveries : vol.I 

 - Bhavana Books & Prints, New Delhi  1996 
 - xvi,188p ill. 
<br/><br/><label>ISBN: </label>81-86505-15-6 (sets) 
<br/><br/><label>Dewey Class. No.: </label>503 ESDID