TY  - BOOK
ED  - International Labour Office
TI  - Model code safety regulations for underground work in coal mining industry
AV  - HD 7269.M62 I6
PY  - 1950///
CY  - Geneva
PB  - [A. Kundig]
KW  - Hulla -
KW  - Minas y mineria -
KW  - Medidas de seguridad
ER  -