George has been a part of several artist collectives.
1953 – 1982: |
Vereniging Pulchri Studio |
member |
1956 – 1957: |
Verve |
member |
1956 – 1962: |
Posthoorngroep |
member |
1960 – 1967: |
Fugare |
founder |
1961 – 1966: |
Haagse Kunstkring |
president of the visual arts department |