Northrup, Herbert Roof <br/><br/>
Open shop construction 
by Herbert R. Northrup and Howard G. Foster. 
 - Philadelphia  Industrial Research Unit, Wharton School, University of Pennsylvania : distributed by University of Pennsylvania Press  c1975. 
 - xxi, 400 p.  ill.  23 cm. 
 - Major study - Industrial Research Unit ; no. 54 .
 - Wharton School.  Industrial Research Unit.  Major study - Industrial Research Unit  no. 54. .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0812290895  15.00 
<br/><br/><label>LCCN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Construction industry--Personnel management.--United States<br/>Industria de la Construccion--Personal--Administración.--Estados Unidos<br/>Open and closed shop--United States
<br/><br/><label>Dewey Class. No.: </label>331.88/92