Williamson. Edmund Griffith, 1900- Students personnel services in colleges and universities. Some foundations, techniques, and processes of program administration. New York, McGraw-Hill, 1961. 474 p. 22 cm Bibliografía al pie de la página <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof01100437" property = "oa:link" href="http://www.worldcat.org/oclc/570202967">WorldCat</a>