Encyclopedia of geographic information sources a detailed listing of publications and agencies of interest to managerial personnel, with a record of sourcebooks, periodicals, guides to doing business, government and trade offices, directories, handbooks, / 
Paul Wasserman, managing editor, James Sanders and Elizabeth Talbot Sanders, associate editors 
 - 3rd ed. 
 - Detroit, Mich.:  Gale Research Co.,  1978 
 - 167 p. ;  28 cm. 
<br/><br/> Originally issued as v. 2 of the Encyclopedia of business information sources 
<br/><br/><label>ISBN: </label>0810303744 
<br/><br/><label>LCCN: </label>78-55032 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business--Information services