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. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Terrestrial communities -- Productivity -- Austria.<br/> Fresh water communities -- Productivity -- Austria.<br/> Marine ommunities -- Productivity -- Austria.<br/> Terrestrial communities -- Conservation -- Austria.