Taxonomic literature : a selective guide to botanical publications and collections with dates, commentaries and types. Supplement VIII, Fres-G - Dorr, Laurence J. (A.R.G. Gantner Verlag K.G, 2009)

Taxonomic literature : a selective guide to botanical publications and collections with dates, commentaries and types. Volume VII, W-Z - Cowan, Richard S., 1921 -1997 (Bohn, Scheltema & Holkema, 1988)

Taxonomic literature : a selective guide to botanical publications and collections with dates, commentaries and types. Volume III, Lh-O - Cowan, Richard S., 1921 -1997 (Bohn, Scheltema & Holkema, 1976)

Taxonomic literature : a selective guide to botanical publications and collections with dates, commentaries and types. Volume V, Sal-Ste - Cowan, Richard S., 1921 -1997 (Bohn, Scheltema & Holkema, 1976)

Taxonomic literature : a selective guide to botanical publications and collections with dates, commentaries and types. Supplement III, Br-Ca - Mennega, E. A. (Koeltz Scientific Books, 1995)

Taxonomic literature : a selective guide to botanical publications and collections with dates, commentaries and types. Volume VI, Sti-Vuy - Cowan, Richard S., 1921 -1997 (Bohn, Scheltema & Holkema, 1986)

Taxonomic literature : a selective guide to botanical publications and collections with dates, commentaries and types. Volume IV, P-Sak - Cowan, Richard S., 1921 -1997 (Bohn, Scheltema & Holkema, 1983)

Taxonomic literature : a selective guide to botanical publications and collections with dates, commentaries and types. Supplement IV, Ce-Cz - Mennega, E. A. (Koeltz Scientific Books, 1997)

Taxonomic literature : a selective guide to botanical publications and collections with dates, commentaries and types. Volume II, H-Le - Cowan, Richard S., 1921 -1997 (Bohn, Scheltema & Holkema, 1979)

Taxonomic literature : a selective guide to botanical publications and collections with dates, commentaries and types. Volume I, A-G - Cowan, Richard S., 1921 -1997 (Bohn, Scheltema & Holkema, 1976)