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Zur Systematik der Aphiden
Published in Tijdschrift Voor Entomologie, in 1913, in volume 56, pages 69-155
Created: 2011-02-16, modified: 2011-06-21
Notes on Oriental Aphididae
Published in Tijdschrift voor Entomologie, in 1918, in volume 61, issue 1/2, pages 112-127
Created: 2010-01-11, modified: 2011-06-21
Notes on some Indian Aphides
Published in Records of the Indian Museum, in 1917, in volume 13, pages 175-183
Created: 2011-06-02, modified: 2023-02-16
On Habropogon jucundus v. d. W
Published in Notes From The Leyden Museum, in 1899, in volume 20, issue 4, pages 231-232
Created: 2015-08-05, modified: 2015-08-05
Niederländische Heideschafe
Published in Zeitschrift für Säugetierkunde, in 1963, in volume 28, pages 248-255
Created: 2016-08-03, modified: 2016-08-03