Pteridophyta of Peru. Rolla M. Tryon, Robert G. Stolze ; with the collaboration of John T. Mickel, Robbin C. Moran.

n.s. no.27(1991)

Ferns and fern allies of Guatemala. Robert G. Stolze ; the genus Elaphoglossum by: John T. Mickel ; the genus Thelypteris by: Alan R. Smith.

n.s. no.6(1981)

Pteridophyta of Peru. Rolla M. Tryon, Robert G. Stolze ; with the collaboration of Blanca León.

n.s. no.32(1993)

Pteridophyta of Peru. Rolla M. Tryon, Robert G. Stolze.

n.s. no.22(1989)

Pteridophyta of Peru. Rolla M. Tryon, Robert G. Stolze ; contributed by Alan R. Smith.

n.s. no.29(1992)

Pteridophyta of Peru. Rolla M. Tryon, Robert G. Stolze.

n.s. no.20(1989)

Pteridophyta of Peru. Rolla M. Tryon, Robert G. Stolze ; with the collaboration of: R. James Hickey, Benjamin Øllgaard.

n.s. no.34(1994)

Geographic variation and evolutionary relationships among broad-clawed shrews of the Cryptotis goldmani-group (Mammalia, Insectivora, Soricidae) / Neal Woodman, Robert M. Timm.

n.s. no.91(1999)

Late Devonian fresh-water fishes from the western United States / Robert H. Denison --

v.11:no.5(1951)

The Paragould meteorite / Sharat Kumar Roy -- and Robert Kriss Wyant --

v.10:no.23(1955)

Distributional notes on Nepal birds [by] Robert L. Fleming and Melvin A. Traylor.

v.53:no.3(1968)

A new species of frog of the genus Rana from Thailand [by] Robert F. Inger.

v.51:no.14(1970)

Diet and arboreality in the emerald monitor, Varanus prasinus : with comments on the study of adaptation : a contribution in celebration of the distinguished scholarship of Robert F. Inger on the occasion of his sixty-fifth birthday / Harry W. Greene.

n.s. no.31(1986)

New species and new records of fishes from Bermuda [by] Loren P. Woods and Robert H. Kanazawa.

v.31:no.53(1951)