http://www.ciesin.org/datasets/us-demog/us-demog-home.html

This is the Center for Information Earth Science Network (CIESN) site on population. "The Demography HomePage is part of an initiative to identify, document, and provide simple access to demographic information concerning The United States of America. This part describes CIESIN's data holdings and related information."

http://adsri.anu.edu.au/

This site is maintained by the Australian Demographic and Social Research Institute. "The Australian Demographic and Social Research Institute (ADSRI) aims to retain and enhance the University's position as the leading Australian research and training institution for demography and social research, recognised both nationally and internationally for its work."

http://www.nidi.nl/en?set_language=en

This is the site of the Netherlands Interdisciplinary Demographic Institute. "NIDI is a research institute of the Royal Netherlands Academy of Arts and Sciences (KNAW) and is affiliated with the University of Groningen (RUG). NIDI is engaged in the scientific study of population (demography)."

http://www.brown.edu/academics/population-studies/

"The Population Studies and Training Center (PSTC) at Brown University, formally established in 1965, is an internationally respected demography research and training center offering an outstanding interdisciplinary graduate training program and fostering a stimulating environment for population-related research and education."

http://www.hsph.harvard.edu/population-development/

"Welcome to the Harvard Center for Population and Development Studies. As a University-wide initiative, we bring together scientists from all corners of the Harvard campus--and beyond--to make exciting advances in population research. With seven billion people living on the planet and a projected nine billion by 2050, our focus is on examining the most nuanced trends and important challenges in this century."

http://durkheim.uchicago.edu/Biography.html

http://www.cf.ac.uk/socsi/undergraduate/introsoc/durkheim1.html

http://www.iep.utm.edu/durkheim/

These sites contain biographies of Émile Durkheim.

http://www.researchgate.net/publication/6736560

Here is a discussion of anthropological demography that includes the foundation of the rule of endogamy.