Manual for Mineralogical Analysis 1983, MYUPM-UNIPERMA-13-402, Container: Gedung 1/54. MAIN ARCHIVES.
Manual for Mineralogical Analysis 1983, MYUPM-UNIPERMA-13-402, Container: Gedung 1/54. MAIN ARCHIVES. http://putraarchives.upm.edu.my:8081/repositories/2/resources/986 Accessed March 14, 2025.