an old oneS but need to see

The Validity of Retrospective Reports of Unwanted Births in the United States: Effects of Preference for Children of a Given Sex
David L. Kruegel
Studies in Family Planning, Vol. 6, No. 9 (Sep., 1975), pp. 345-348
(article consists of 4 pages)
Published by: Population Council
Stable URL: http://www.jstor.org/stable/1964701

The Estimation of Unwanted Fertility
John B. Casterline and Laila O. El-Zeini
Demography, Vol. 44, No. 4 (Nov., 2007), pp. 729-745
(article consists of 17 pages)
Published by: Population Association of America
Stable URL: http://www.jstor.org/stable/30053115