Williams, William Appleman The contours of American history, With a new foreword by the author. Chicago, Quadrangle books [c1966] 513 p. 21 cm (Quadrangle paperback) <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof01100427" property = "oa:link" href="http://www.worldcat.org/oclc/757253388 ">WorldCat</a>