TY - GEN ED - BUREAU OF CEYLON STANDARDS TI - SLS 297 : part 6 : 1976 : Methods of testing vulcanized rubber determination of resistance to flex cracking PY - 1976/// CY - Colombo PB - Bureau of Ceylon Standards KW - a678.43:620.19 KW - STANDARDS-SRI LANKA KW - SRI LANKA-STANDARDS N1 - STD2512 ER -