Gas fired muffle furnaces. 

 - London :  Heinemann Educational Books Ltd.,  1972. 
 - 20 p. ;  30 cm. 
 - Project technology handbook/ 6 .
<br/><br/><label>ISBN: </label>0435759051 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gas furnaces.