TY - BOOK ED - Institut Piawaian dan Penyelidikan Perindustrian Malaysia TI - Method of test for softening point of bitumen and tar pitches (ring-and-ball apparatus) T2 - Malaysian Standard PY - 1981/// CY - Shah Alam, Selangor PB - Standards and Industrial Research Institute of Malaysia KW - Bituminous material KW - Testing KW - Standards KW - Malaysia ER -