KLEIJN LJ & TEKKE MJ (1940) Obituary. J.C. Koch, P.L. Steenhuizen, F.C. van Heurn. LIMOSA 13 (4): 154-154.

Dr. J. C. Koch, 30 April 1886 ~ 30 November 1940. Eenkortstondig died after illness plotselingin the prime of his life our fellow ch 0 K, which one of the most valued club members and most faithful visitors of meetings could be counted. His departure is a blow for the Dutch Ornithology in general and the Wassenaar Ring Station in particular. are interest. The ornithology was not aileen the migration, but oologie the oak was for him a land, which he willingly moved; many of his articles in Oils organ testify to this.

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