Transporte neumático de materiales pulverulentos / Engineering Equipment Users Association - 1a. ed. - Barcelona : Constable & Comany, 1974 - 164 p. : 164 p. ; fig. ; tab. ; 21 cm. ISBN: 8433562564 Subjects--Index Terms: NEUMATICA LC Class. No.: / E 56 Universal Decimal Class. No.: 62-85