Czapla, Dominika, Lucyna Natkaniec-Nowak, and Przemysław Drzewicz. “Microhardness As a Method for Investigation of Fossil Resins”. Geology, Geophysics and Environment 42, no. 1 (July 17, 2016): 63. Accessed November 22, 2024. https://journals.agh.edu.pl/geol/article/view/1869.