TY - BOOK ED - Makmal Penyiasatan Kajibumi TI - Volume I subsidence and sinkhole occurence in Bukit Merah new village Menglembu, Ipoh PY - 1982/// KW - Geology KW - Ipoh KW - Perak N1 - Includes bibliographical references N2 - The objective of the investigation are to investigate the cause of the sinkhole formation, to investigate the cause of the land subsidence and related slope stability problem, and to demarcate the danger zone ER -