To piece together all the information on George, his expositions, publications and everything else we used a variety of sources.
Nieuwe Haagse School Kunst
Website on the Nieuwe Haagse School (New Hague School), filled with information on the George’s contemporaries and colleagues.
RKD Dutch institute of Art History
Nieuwe Haagse School
A wonderful book by Ton Knoester and Roelie Knoester-Penninkhof about the New Hague School, published in 2002.
Special thanks to Wouter en Marian.