• Piet Zwart, C.A.H. Broos: PIET ZWART EN PTT. The Hague: Haags Gemeentemuseum, 1968.
  • Piet Zwart - NKF (Netherlands Cable Factory) 'The company security of our normal cable is enormous' 1925
  • History Dutch Graphic Design
  • By Piet Zwart, 1 9 3 2, Dutch film periodical cover. @Deidré Wallace
  • piet zwart
  • Piet Zwart
  • Piet Zwart - NKF (Netherlands Cable Factory) Hard and soft Copper Core, 1930
  • Piet Zwart invoice. Zwart is one of Mr. Williams's design heroes.
  • Piet Zwart:
  • Piet Zwart - NKF (Netherlands Cable Factory) 1st rule of cable quality is Ionisation and Tension, 1925
  • Piet Zwart  poster / studio Dunbar
  • Zwart was the master.
  • Album Amicorum: Het boek van de PTT door Piet Zwart
  • Piet Zwart - Pomona's Nutter Vetpot, (Nut based oil products) 1923
  • Piet Zwart: The Rebellious Type
  • Piet Zwart
  • Piet Zwart - NKF (Netherlands Cable Factory) Catalogue, 1928
  • Bridge in The Hague. Letter design attributed to Piet Zwart.
  • Piet Zwart - Trio Printers, The Hague, 1931
  • Piet Zwart