Potkov, L. A. [from old catalog] <br/><br/>
A world we do not see / 
Lev Potkov 
 - Moscow :  Foreign Languages Pub. House,  1957. 
 - 218 p. :  illus. ;  20 cm. 
<br/><br/>Includes Index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Microorganisms.<br/>Microbiology
<br/><br/><label>Dewey Class. No.: </label>579  / POW 1957