Four generations : population, land, and family in colonial Andover, Massachusetts / Philip J. Greven, Jr.. - Ithaca ; London : Cornell University Press, [1972]. - xvi, 329 p. : tab., graph., map ; 22 cm.см.. - (Cornell paperbacks). - Bibliogr.: p. 295-315. - ISBN 0-8014-9134-7[MFN: 34217]