Donrichardsia, a new genus of Amblystegiaceae (musci) / Howard Crum, Lewis E. Anderson.

n.s. no.1(1979)

Ferns and fern allies of Guatemala. Robert G. Stolze.

n.s. no.12(1983)

Early devonian vertebrates from the Keoydart formation of Nova Scotia.

v.37:no.17(1955)