The Juglandaceae of Guatemala / Louis O. Williams and Antonio Molina R.

v.32:no.13(1970)

Flora of Guatemala / Dorothy L. Nash ; Cucurbitacae contributed by Jennie V.A. Dieterle.

v.24:pt.11:no.4(1976)

Flora, Tehuacán Valley [by] C. Earle Smith, Jr.

v.31:no.4(1965)

A revision of the Family Geastraceae.

v.31:no.14(1968)

Flora of Guatemala / Johnnie L. Gentry, Paul C. Standley.

v.24:pt.10:no.1-2(1974)

Tropical American plants, II / Louis O. Williams.

v.29:no.6(1961)

Preliminary studies in the palm genus Syagrus Mart. and its allies / [by] S. F. Glassman.

v.31:no.5(1965)

Preliminary notes on the Scrophulariaceae of Peru.

v.31:no.8(1967)

Orchids of Peru / Charles Schweinfurth.

v.30:no.2(1959)

Flora of Guatemala / Paul C. Standley and Louis O. Williams.

v.24:pt.9:no.3-4(1973)

Flora of Guatemala / Paul C. Standley and Louis O. Williams.

v.24:pt.7:no.1(1961)

Monograph of the genus Russelia (Scrophulariaceae)

v.29:no.4(1957)

Tropical American plants, X / Louis O. Williams.

v.32:no.4(1968)

Tropical American plants, XI / Louis O. Williams.

v.32:no.12(1970)

Contributions to the flora of Venezuela : from Ericaceae through Compositae / Julian A. Steyermark and collaborators.

v.28:no.3(1953)