Wilhelmus Pieterse Member LWSK / guest Name W.P. Pieterse Telephone +31 71 527 5737 E-mail piete095@planet.nl Member LWSK / guest Science Sterrewacht Sterrewacht Work address Gorlaeus Building Einsteinweg 55 2333 CC Leiden Contact +31 71 527 5737 piete095@planet.nl No relevant ancillary activities