Washington, DC: Brassey's, Inc., 1995. ISBN 0-02-881129-1. Onderwater, Hans. Operatie "Manna": De Gealieerde Voedseldroppings April/Mei 1945 (in Dutch). Weesp...
the goshawk. He came into contact with Maarten Bijleveld, who initiated Operatie Havik ("Operation Goshawk") at that time, and with H.J. Slijper, the falconer...