Grigorev, V. I. (Vladimir Ivanovich) <br/><br/>
The forces of nature / 
[by] V. Grigoryev [and] G. Hyakishev ; tr. from the Russian by George Yankovsky. 
 - Moscow :  Mir Publishers,  1971. 
<br/><br/> Rev. from the 1964 Russian ed.  First published 1967. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Force and energy.