The planktonic freshwater species of Microcystis, by Francis Drouet ... and William A. Daily.

v.20:no.3(1939)

Flora of West Virginia, by Charles Frederick Millspaugh and Lawrence William Nuttall.

v.1:no.2(1896)

Flora Costaricensis / William Burger, editor.

v.40(1977)

Notes on the flora of Costa Rica, I / [by] William C. Burger.

v.31:no.11(1968)

The naturalist in Vancouver Island and British Columbia. By John Keast Lord ...

v. 2

The naturalist in Vancouver Island and British Columbia. By John Keast Lord ...

v. 1

Flora Costaricensis / William Burger, editor.

n.s. no.36(1995)

Flora Costaricensis / William Burger, editor.

n.s. no.33(1993)

Flora Costaricensis / William Burger, editor.

n.s. no.23(1990)

Flora Costaricensis. William Burger, editor. Family #40, Casuarinaceae, Family #41, PIperaceae [by] William Burger.

v.35(1971)

Flora Costaricensis / William Burger, editor.

n.s. no.13(1983)

Flora costaricensis / William Burger, editor.

n.s. no.41(2000)