Bjorkman, E., Lundeberg, G. Studies of root competition in a poor pine forest by supply of labelled nitrogen and phosphorus. Stockholm: 1971 16 p. : ill.
Bjorkman, E., Lundeberg, G. Studies of root competition in a poor pine forest by supply of labelled nitrogen and phosphorus. Stockholm: 1971 16 p. : ill.
Bjorkman, E., Lundeberg, G. (1971) Studies of root competition in a poor pine forest by supply of labelled nitrogen and phosphorus, Stockholm: 16 p. : ill.
Bjorkman, E., & Lundeberg, G. (1971). Studies of root competition in a poor pine forest by supply of labelled nitrogen and phosphorus. Stockholm: 16 p. : ill.
Bjorkman E, Lundeberg G. Studies of root competition in a poor pine forest by supply of labelled nitrogen and phosphorus. Stockholm: 1971. p. 16 p. : ill.