Visser, D. J. L. (1969). The J. Willemse commemorative volume: Containing the papers presented at the Symposium on the Bushveld Igneous Complex and Other Layered Intrusions ; Pretoria, july 7 - 14, 1969.
Chicago-Zitierstil (17. Ausg.)Visser, D. J. L. The J. Willemse Commemorative Volume: Containing the Papers Presented at the Symposium on the Bushveld Igneous Complex and Other Layered Intrusions ; Pretoria, July 7 - 14, 1969. Johannesburg, 1969.
MLA-Zitierstil (9. Ausg.)Visser, D. J. L. The J. Willemse Commemorative Volume: Containing the Papers Presented at the Symposium on the Bushveld Igneous Complex and Other Layered Intrusions ; Pretoria, July 7 - 14, 1969. 1969.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.