International congresses and conferences, 1840-1937 :  a union list of their publications available in libraries of the United States and Canada / 
edited by Winifred Gregory 
 - New York :  H. W. Wilson Co.,  1938 
 - 3 , 229 p. ;  36 cm. 
<br/><br/><label>ISBN: </label> USD 6.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Congresses and conventions--Bibliography<br/>Catalogs, Union
<br/><br/><label>Dewey Class. No.: </label>017.1