Handbook of the fern-allies: a synopsis of the genera and species of the natural orders Equisetaceœ, Lycopodiaceœ, Selaginellaceœ, Rhizocarpeœ,

Photocopy.

The methodology of knowledge layers for inducing descriptions of sequentially ordered events /

"UILU-ENG 80 1719"--Cover.

The significance of color banding in the upper layers of Kara Sea sediments.

"CG 373-36."

Nuclear meters for measuring soil density and moisture in thin surface layers,

Cover title.

Hah und Fern : von J. Ludw. Heiberg ; aus dem ... von G. Jacke.

Texto impreso en letra gótica.

Experimental relationships between moduli for soil layers beneath concrete pavements /

Mode of access: Internet.

The "Fern ledges", Carboniferous flora of St. John, New Brunswick,

Mode of access: Internet.

Experimental studies to determine the chemical species prevalent in the plasma of an air arc and the boundary layers adjacent to ablating materials

Mode of access: Internet.

Damping of flexural vibrations by alternate visco-elastic and elastic layers

"Materials Laboratory, Contract no. AF 33(616)-5426, Project no. 7360."

The shock layer concept and three-dimensional hypersonic boundary layers.

"This report is based on research sponsored by the U.S. Navy through the Office of Naval Research, Contract Nonr-2653(00)"

The development of the ostrich fern, Onoclea struthiopteris.

Caption title.

The fern bulletin.

"A quarterly devoted to ferns."

Fernwort papers presented at a meeting of fern students, held in New York city, June 27, 1900, under the auspices of the Linnaean fern chapter ... .

Cover title.

Papers presented at the Boston meeting, under the auspices of the Linnaean Fern Chapter, August 24, 1898.

Cover title.

Taxonomy of specimens of the Pennsylvanian age Marattialean fern Psaronius from Ohio and Illinois/

Bibliography: p. 61-64.