GRAY, Dwight E. <br/><br/>
Man and his physical world / 
[by] Dwight E.Gray 
 - 2nd ed. 
 - Toronto  D.Van nostrand  1954 
 - xii, 699 p. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>92500 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Dewey Class. No.: </label>500  / GRA