Johns, R. J.
The ferns and fern allies of the Central, Western and South Pacific Basin R. J. Johns. - Lae Forestry Dept., P.N.G. Unitech [ca. 1979]. - 8 leaves.
Cover title.
Ferns--Research.--Islands of the Pacific
The ferns and fern allies of the Central, Western and South Pacific Basin R. J. Johns. - Lae Forestry Dept., P.N.G. Unitech [ca. 1979]. - 8 leaves.
Cover title.
Ferns--Research.--Islands of the Pacific