Google Book Search
Google Book Search
http://books.google.nl/books?ct=title&q=proefschrift&as_brr=0
DAREnet
DAREnet
http://www.darenet.nl/
Igitur archief
Igitur archief
http://www.igitur.nl/igiturarchief/index.php
Koninklijke Bibliotheek
Koninklijke Bibliotheek
http://opc4.kb.nl/charset=iso-8859-1/db=1/lng=ne/ttl=1/rel?ppn=088144445
Tesiononline
Theses and dissertations
http://www.tesionline.com/intl/index.jsp
RUG dissertations
RUG dissertations
http://dissertations.ub.rug.nl/
Thesis.biz
Thesis.biz
http://www.thesis.biz/