Emil Mosonyi

Mellékleteteket tartalmaz. Lapélükön kisebb foltok találhatók. A II. kötet gerincén benyomódás vehető észre.

PREFACE The production of electric energy may well be considered the technical basis of present economic development. The demand for electric energy increases from year to year. More than one-third of this demand is at present supplied by hydroelectric power plants and thus the full exploitation...