Havilick, Spencer W. <br/><br/>
Urban organism : the city's natural resources from an environmental perspective 
Spencer W. Havlick 
 - New York  Macmillan Publishing  c1974 
 - x,515p.; ill.; 23cm. 
<br/><br/><label>Dewey Class. No.: </label>910.1333770973  / HAV