1
2
Published: 1923-1950
3
Published: 1923
Superior document: Geological, petrographical and palaeontological results of explorations, carried out from September 1917 till June 1919 in the island of Ceram 1 1
4
Published: 1928
5
Published: 1931
Superior document: Geological, petrographical and palaeontological results of explorations, carried out from September 1917 till June 1919 in the island of Ceram 1 2
6
Published: [1928]