Progressive report 1968 of the Austrian National Committee for Inter national Biological Programme (IBP), February 1969. - Vienna : Austrian IPB National Committee, 1968. - 6 p. : ill. ; 28 cm. Subjects--Topical Terms: Terrestrial communities -- Productivity -- Austria. Fresh water communities -- Productivity -- Austria. Marine ommunities -- Productivity -- Austria. Terrestrial communities -- Conservation -- Austria.