Greven, Philip J. Four generations: population, land, and family in colonial Andover, Massachusetts / [by] Philip J. Greven, Jr. - Ithaca, N.Y., Cornell University Press, 1970. - xvi, 329 p. illus., fold. map. 23 cm. Bibliography: p. [295]-315. ISBN: 0801491347 LCCN: 76-087018 Subjects--Topical Terms: Xã hội họcĐời sống xã hộiPhong tụcSociology. Subjects--Geographic Terms: Andover (Mass.)--Social life and customs. LC Class. No.: F74.A6 / G7 Dewey Class. No.: 301 / GRE 1970