Kees Kalkman; Kalkman; C. Kalkman; C Kalkman
May 05, 1928 – January 19, 1998
botanist, university teacher
Dutch botanist (1928–1998)
http://www.wikidata.org/entity/Q5199552
https://en.wikipedia.org/wiki/Cornelis_Kalkman [View]
Kingdom of the Netherlands