Knut Faegri
Textbook of pollen analysis
The principles of pollination ecology
Coast plants
Introduction to Relativistic Quantum Chemistry
Bestimmungsschlüssel für die nordwesteuropäische Pollenflora
Dikteren og hans blomster
Johan Havaas er 90 ar
Major ecological steps in the development of plant life
Norges planter
Om de i Norden iakttatte Amsinckia-arter
On some finds of Schoenus ferrugineus in western Norway
Quartärgeologische Untersuchungen im westlichen Norwegen