Weir, John <br/><br/>
Effects of physical characteristics of coal occurrence and current mining methods on economic recoverability 

<br/><br/> <Donation ORSTOM> 
<br/><br/>bibliogr. p. 562 
<br/><br/><label>ISSN: </label>00167606 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal measures<br/>Charbon<br/>Gisement potentiel<br/>Evaluation gîte<br/>Géologie minière
<br/><br/><label>Subjects--Index Terms: </label>Etats Unis