RECOMMENDED BOOKS & PUBLICATIONSIssues of Sustainability Demography Revised 31 August 2021 ADVANCED LEVEL OF READING Keyfitz, N., and J.A. Beekman. Demography through Problems. New York, Springer-Verlag, 1984. Keyfitz, N. and H. Caswell. Applied Mathematical Demography. New York, Springer, 3rd Edition 2005.