Nostoc-cycad symbiosis :
Lindblad, Peter
Nostoc-cycad symbiosis : with emphasis on the cyanobiont / [by] Peter Lindblad. - Uppsala : Almqvist & Wiksell in Komm., 1987.
Nostoc-cycad symbiosis : with emphasis on the cyanobiont / [by] Peter Lindblad. - Uppsala : Almqvist & Wiksell in Komm., 1987.