An overlooked genus of the Scrophulariaceae / Louis O. Williams.

v.32:no.14(1970)

Tropical American plants, IX / Louis O. Williams.

v.31:no.18(1968)

Tropical American plants, V / Louis O. Williams.

v.29:no.10(1963)

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

v.24:pt.9:no.1-2(1970)

Tropical American plants, VIII / Louis O. Williams.

v.31:no.10(1967)

Tropical American plants, III / Louis O. Williams.

v.29:no.7(1962)

Flora of Guatemala / Paul C. Standley, Louis O. Williams, Dorothy Nash Gibson.

v.24:pt.10:no.3-4(1974)

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

v.24:pt.8:no.4(1969)

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

v.24:pt.8:no.1-2(1966)

Kongliga Svenska Fregatten Eugenies resa omkring jorden : under befäl af C.A. Virgin, åren 1851-1853 : vetenskapliga iakttagelser ... utgifna af K. Svenska Vetenskapsakademien

v. 2, pt. 1

Hoffmannias from Mexico and Central America [by] Louis O. Williams.

v.36:no.6(1973)

Tropical American plants, XVII / Louis O. Williams.

v.36:no.10(1975)

Bignoniaceae of tropical North America [by] Louis O. Williams.

v.36:no.4(1973)

Tropical American plants, XII / Louis O. Williams.

v.34:no.8(1972)

Eplingia, a new genus of the Labiatae from Mexico [by] Louis O. Williams.

v.36:no.3(1973)