Bronfenbrenner, Urie, 1917-2005. The ecology of human development : experiments by nature and design / Urie Bronfenbrenner. - Cambridge, Mass. : Harvard University Press, c1979. - 330 p. Includes bibliographical references and index ISBN: 0674224574 Subjects--Topical Terms: Child psychology--Research.Human development. LC Class. No.: BF722 / B766E 1979