Limestone cave formation in Sarawak and North Borneo - Wilford, G. E.; Borneo. Geological Survey Department (Kuching : Government Printing Office, 1963)
Reprint from : Proceedings of the British Borneo Geological conference 1961. British Borneo Geological Survey Bulletin 4, 1963, pp. 161-173
Keywords: Limestone -- Sarawak; Limestone -- North Borneo; Caves -- North Borneo