Quarter 4 Biography-Bart Bok Sources

http://www.newnetherlandinstitute.org/history-and-heritage/dutch_americans/bart-jan-bok/

http://www.aip.org/history/ohilist/4518_1.html

http://www.britannica.com/EBchecked/topic/71903/Bart-J-Bok

http://adb.anu.edu.au/biography/bok-bart-jan-129

http://www.nasonline.org/publications/biographical-memoirs/memoir-pdfs/bart-bok.pdf