Az Országos Vízügyi Hivatal elnökének beszámolója a vízgazdálkodás eredményeiről és feladatairól
By: [Gergely István].
Contributors: Hungary. Országos Vízügyi Hivatal.
Publisher: [s.n.]
Published: 1977
Place of publication: Budapest
Language: hun
Number of pages: 25
Subjects: Water-supply -- Hungary.