TAPS: Twins, Adoptees, Peers, and Siblings Study

http://www.usfca.edu/fac-staff/mcguire/taps

Science Book Review: X and Y, A Wild Pair (2003)


http://www.sciencemag.org/cgi/content/full/301/5633/599?ijkey=F76oPW3adGGRU&keytype=ref&siteid=sci 

National Mothers of Twins Club 
http://www.nomotc.org

Cloning Exhibit in London 
http://news.bbc.co.uk/hi/english/sci/tech/newsid_401000/401098.stm

New Gorilla Twins Born 
http://www.discovery.com/cams/gorillas/gorilla.html

Human Genome Project 
http://www.nytimes.com/library/national/science/genome-index.html

International Society for Human Ethology 
http://evolution.humb.univie.ac.at/

Behavior Genetics Association  
http://www.bga.org/

Twins Foundation 
http://www.twinsfoundation.com

Twin Research Journal  
http://www.ists.qimr.edu.au/journal.html

Twin Stuff  
http://www.twinstuff.com

About Multiples  
http://multiples.about.com

About Multiple Births
http://www.multiplebirthsfamilies.com/

Twinless Twins organization

http://www.twinlesstwins.org/

Twinless Twin Survey

http://psych.fullerton.edu/nsegal/twinless/twinless.pdf

Prometheus Books

http://www.prometheusbooks.com/