The ferns and fern allies of Papua New Guinea /
Johns, Robert J.
The ferns and fern allies of Papua New Guinea / by R.J. Johns ; ill. by A. Bellamy. - Lae : Papua New Guinea University of Technology, 1979- - v. 1-2. - Research report ; R48-81 . - Research and technical report (Papua New Guinea University of Technology) ; R48/81 .
Ferns--Papua New Guinea.
The ferns and fern allies of Papua New Guinea / by R.J. Johns ; ill. by A. Bellamy. - Lae : Papua New Guinea University of Technology, 1979- - v. 1-2. - Research report ; R48-81 . - Research and technical report (Papua New Guinea University of Technology) ; R48/81 .
Ferns--Papua New Guinea.