Pocket data book 

 - Washington  Government Printing Office          1969 
 - 358p. Glossary p. 338-45  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social Science
<br/><br/><label>Dewey Class. No.: </label>Sigma.73s, K9