TY  - SER
ED  - Estados Unidos.
TI  - Mine safety and health
SN  - 0161-651X
AV  - TN295 
U1  - 622.8 
PY  - 1978///-
CY  - Arlington, Va.
PB  - U.S. Department of Labor, Mine Safety and Health Administration, Office of Information
KW  - Minas y riquezas minerales
KW  - Seguridad
KW  - Salubridad
N1  - Coal abstracts; Energy research abstracts
ER  -