found: His Field guide to the trees of the Kruger Natl. Park, 1984:title page (Piet Van Wyk)
found: LC data base, 8/28/85(hdg.: Van Wyk, Pieter, 1931- ; usage: P. Van Wyk)
found: SANB correspondence with author, March 26, 1973(full name: Van Wyk, Pieter; date of birth: July 5, 1931)
found: Veldgids tot die bome van die Nasionale Krugerwildtuin, 2008:title page (Piet van Wyk) page 4 of cover (Piet van Wyk, 1931-2006)
found: Field guide to trees of southern Africa, 2013:t.p. (Piet van Wyk) p. 4 of cover (Piet van Wyk (1931-2006); a graduate of Potchefstroom University, worked as a biologist with the Kruger National Park's research team until his retirement in 1991; an excellent photographer, he established a large collection of photographs of native trees)
