Roberts, David. <br/><br/>
Okul ansiklopedisi :  Bilimler ve buluşlar / 
by David Robert. 
 - İstanbul :  Nesa,  [19--] 
 - 190 p. :  ill., col ;  27 cm. 
<br/><br/> This book is in Turkish. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invention--encyclopedias.