, .
Direct Use of Coal: Prospects and Problems of Production and Combustion / - Massachusetts : Ballinger Publishing company. - xv, 411p :
Fine Arts
F551(X:2) / [M3]
Direct Use of Coal: Prospects and Problems of Production and Combustion / - Massachusetts : Ballinger Publishing company. - xv, 411p :
Fine Arts
F551(X:2) / [M3]