Zipf, George Kingsley, 1902-1950.  Zipf, George Kingsley, 1902-1950. <br/><br/>
Human behavior and the principle of least effort :  an introduction to human ecology. 

 - Facsim. of 1949 ed. 
 - New York :  Hafner Pub. Co.,  1965, [c1949] 
<br/><br/>Bibliographical references included in "References" (p. 545-564). 
<br/><br/><label>LCCN: </label>65020086 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology.
<br/><br/><label>LC Class. No.: </label>H91  / .Z5 1949a