The microscope; an introduction to microscopic methods and to histology, by Simon Henry Gage ...

12th ed

Useful plants and drugs of Iran and Iraq / by David Hooper. With notes by Henry Field.

v.9:no.3(1937)

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

v.24:pt.8:no.3(1967)

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

v.32:no.13(1970)

Tropical American plants, II / Louis O. Williams.

v.29:no.6(1961)

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)

Tropical American plants, X / Louis O. Williams.

v.32:no.4(1968)

Tropical American plants, XI / Louis O. Williams.

v.32:no.12(1970)

Flora of Guatemala / Dorothy L. Nash, Louis O. Williams ; genera contributed by Kenneth M. Becker ... [et al.].

v.24:pt.12(1976)

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

v.24:pt.7:no.4(1963)

Tropical American plants, VII / Louis O. Williams.

v.31:no.6(1965)

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

v.24:pt.7:no.2(1962)