TY  - BOOK
ED  - International Organization for Standardization
TI  - ISO: 13909-4(Ed-2)-2016-07-01; Corrected version 2016-11-01; Hard coal and coke-mechanical sampling-part 4: coal-preparation of  test samples
PY  - 2016///
CY  -    Switzerland
PB  - ISO
ER  -