Benson, Grant D;
Axinn, William G;
Lepkowski, James M; Groves, Robert M.; Granda, Peter A.; Mosher, W D; Rosenbaum, J; Chandra, A. (2005). Plan and operation of Cycle 6 of the National Survey of Family Growth.. Vital and health statistics.Ser.1, Programs and collection procedures.. (42), 1-86.