Grigorev, V. I. <br/><br/>
The forces of nature / 
by V. Grigoryev and G. Myakishev ; translated from the Russian by Ceorge sic Yankovsky 
 - Moscow :  Mir Publishers,  1967 
 - 343 p. :  ill. ;  21 cm. 
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<br/><br/><label>LCCN: </label>68-2337 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Force and energy