Bert van Sprang
was the founder of the Dutch
youth division ("JWG", or Jongeren Werk Groep
) of the Dutch association of meteorology
("NVWS", or Nederlandse Vereniging voor Weer- en Sterrenkunde
) in 1967. Activities carried out by Van Sprang for the JWG included the organization of astro camps, the setting up of a program to build telescopes cheaply, and the writing of many booklets on astronomy topics. He was also program leader of the planetarium in The Hague until it was destroyed by fire in February 1976.