Published in Notes Leyden Mus., in 1900, in volume 21, pages 145-276
Published in Notes from the Leyden Museum, in 1900, in volume 22, pages 70
Published in Notes from the Leyden Museum, in 1900, in volume 22, pages 71-74
Published in Notes from the Leyden Museum, in 1900, in volume 22, pages 75-125
Published in Notes from the Leyden Museum, in 1900, in volume 22, pages 162
Published in Notes from the Leyden Museum, in 1900, in volume 22, pages 193-224
Published in Notes From The Leyden Museum, in 1900, in volume 22, issue 1/2, pages 1-24
Published in Notes From The Leyden Museum, in 1900, in volume 22, issue 1/2, pages 25-26
Published in Notes From The Leyden Museum, in 1900, in volume 22, issue 1/2, pages 27-32
Published in Notes From The Leyden Museum, in 1900, in volume 22, issue 1/2, pages 44-48
Published in Notes From The Leyden Museum, in 1900, in volume 22, issue 1/2, pages 49-69
Published in Notes From The Leyden Museum, in 1900, in volume 22, issue 1/2, pages 126-128