Om våre to eikarter, Quercus robur L. og Quercus petraea (Matt.) Lieblein, deres systematikk og forekomst i Norge = : On the two oak species, native in Norway, Quercus robur L. and Quercus petraea (Matt.) Lieblein, their characteristics and natural occurrence in Norwa
Magne Risdal
Bok Bokmål 1955