Andersen, Svend Th. “Silicone Oil As a Mounting Medium for Pollen Grains”. Danmarks Geologiske Undersøgelse IV. Række 4, no. 1 (December 31, 1960): 1–24. Accessed May 19, 2024. https://geusjournals.org/index.php/raekke4/article/view/7007.