Young, Michael Dunlop, 1915-2002. The symmetrical family, by Michael Young [and] Peter Willmott. With a foreword by Lee Rainwater. - [1st American ed.] - New York, Pantheon Books [1974, c1973] - xxvii, 398 p. illus. 22 cm. ISBN: 0394487273 LCCN: 73007009 LC Class. No.: HD5168.Z98 L669 1974 / L669 1974 Dewey Class. No.: 301.5/5/09421