Family planning in the 1990's : a new era

International family planning perspectives

Localization and confinement of electrons in semiconductors : proceedings of Sixth International Winter School, Mauterndorf, Austria, February 19-23, 1990 / Editor: F. Kuchar

Family planning programs : an international survey

Parallel computing and mathematical optimization: proceedings of the Workshop on Parallel Algorithms and Transputers for Optimization, held at the University of Siegen, FRG, November 9, 1990