Q4 Biography References

http://www.windows.ucar.edu/tour/link=/people/today/kuiper.html&edu=high

http://www.encyclopedia.com/beta/doc/1E1-KuiperGer.html

http://www.nnp.org/nni/Publications/Dutch-American/kuiper.html

http://www.jstor.org/pss/89210

http://www.jstor.org/pss/88474