Published in Notes from the Leyden Museum, in 1901, in volume 23, pages 65-84

Published in Notes from the Leyden Museum, in 1901, in volume 23, pages 53-57

Published in Notes From The Leyden Museum, in 1901, in volume 23, pages 85-90

Published in Notes From The Leyden Museum, in 1901, in volume 23, issue 1, pages 1-14

Published in Notes From The Leyden Museum, in 1901, in volume 23, issue 1, pages 15-16

Published in Notes From The Leyden Museum, in 1901, in volume 23, issue 1, pages 17-31

Published in Notes From The Leyden Museum, in 1901, in volume 23, issue 1, pages 32

Published in Notes From The Leyden Museum, in 1901, in volume 23, issue 1, pages 33-52

Published in Notes From The Leyden Museum, in 1901, in volume 23, issue 2, pages 58-62

Published in Notes From The Leyden Museum, in 1901, in volume 23, issue 2, pages 63-64

Published in Notes From The Leyden Museum, in 1901, in volume 23, issue 2, pages 91-93

Published in Notes From The Leyden Museum, in 1901, in volume 23, issue 2, pages 94

Published in Notes From The Leyden Museum, in 1901, in volume 23, issue 2, pages 95-96

Published in Notes From The Leyden Museum, in 1901, in volume 23, issue 2, pages 97-110

Published in Notes From The Leyden Museum, in 1901, in volume 22, issue 3, pages 129-161

Published in Notes From The Leyden Museum, in 1901, in volume 22, issue 3, pages 163-178

Published in Notes From The Leyden Museum, in 1901, in volume 22, issue 3, pages 179-187

Published in Notes From The Leyden Museum, in 1901, in volume 22, issue 3, pages 188

Published in Notes From The Leyden Museum, in 1901, in volume 22, issue 3, pages 189-192

Published in Notes From The Leyden Museum, in 1901, in volume 22, issue 4, pages 225-310