Flora Costaricensis / William Burger, editor.

v.40(1977)

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)

Flora Costaricensis : Family #200, Acanthaceae by L.H. Durkee, Family #201, Plantaginaceae by William Burger.

n.s. no.18(1986)

Flora Costaricensis / William Burger, editor.

n.s. no.40(1999)

Flora Costaricensis / William Burger, editor.

n.s. no.28(1991)

Flora Costaricensis / William Burger, editor.

n.s. no.45(2005)

Silurian Ischadites tenuis n.sp. (Receptaculitids) from Indiana / Matthew H. Nitecki -- and Charles C. Dapples --.

v.35:no.2(1975)

Cervifurca nasuta n. gen. et sp. : an interesting member of the Iniopterygidae (Subterbranchialia, Chondrichthyes) from the Pennsylvanian of Indiana, U.S.A. / Rainer Zangerl --.

n.s. no.35(1997)

Ordovician Receptaculites camacho n. sp. from Argentina / Matthew H. Nitecki -- and Gerald G. Forney --.

v.37:no.5(1978)

Upper Devonian Receptaculites chardini n. sp. from central Afghanistan / Matthew H. Nitecki -- and Albert F. de Lapparent --.

v.35:no.5(1976)