TY  - SER
AU  - Weir,John
AU  - Mcnulty,James
ED  - Coal geology symposium: The evaluation of North American coal resources
TI  - Effects of physical characteristics of coal occurrence and current mining methods on economic recoverability
SN  - 00167606
KW  - Coal measures
KW  - Charbon
KW  - Gisement potentiel
KW  - Evaluation gîte
KW  - Géologie minière
KW  - Etats Unis
N1  - <Donation ORSTOM>; bibliogr. p. 562
ER  -