Strenght characteristics and air-linkage determinations for alternative mine seal designs / 
by E.S. Weiss ... [et al.]. 
 - Avondale, Md. :  U.S. Dept. of the Interior, Bureau of Mines,  1993. 
 - 21 p. :  ill. 
 - Report of investigations ;  9477 .
 - Report of investigations (United States. Bureau of Mines) ;  9477 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mines and mineral resources.<br/>Concrete mine stoppings (Mining)--Testing.<br/>Cement composites--Testing.<br/>Foamed materials--Testing.<br/>Wood--Testing.<br/>Strenght of materials.<br/>Coal mines and mining.