Scientific American  [microform] 

 - New York :  Scientific American Inc.,  1859- 
 - 77 microfiches ;  11 x 15 cm. 
<br/><br/> v. 230, no.1-6 (Jan-June) 1974 - v.231, no.1-6 (July-Dec) 1974 - v.232, no.1-6 (Jan-June) 1975 - v.233, no.1-6 (July-Dec) 1975 
<br/><br/><label>ISSN: </label>0036-8733 
 = Scientific American