G. Breckon

POPULATION STRUCTURE IN ZAMIA DEBILIS (ZAMIACEAE) I. SIZE CLASSES, LEAF PHENOLOGY, AND LEAF TURNOVER

V. Negrón-Ortíz, G. Breckon, 1989 .

Chemotaxonomic Studies in Cnidoscolus (Euphorbiaceae). II. Flavonoids of C. aconitifolius, C. souzae, and C. spinosus

G. Breckon, R. Kowal, D. Kolterman, 1984 .

Chemotaxonomic Studies in Cnidoscolus (Euphorbiaceae). I. Flavonol Glycosides of the C. tubulosus Complex

G. Breckon, D. Kolterman, 1982 .

Population Structure in Zamia (Zamiaceae) in Northern Puerto Rico. II. Seed Germination and Stage-Structured Population Projection

D. Gorchov, V. Negrón-Ortíz, G. Breckon, 1996, International Journal of Plant Sciences.

EXTERNAL SPORE MORPHOLOGY AND TAXONOMIC AFFINITIES OF PHYLLOGLOSSUM DRUMMONDII KUNZE (LYCOPODIACEAE)

R. H. Falk, G. Breckon, 1974 .

Shell growth of the golden mussel, Limnoperna fortunei (Dunker, 1857) (Mytilidae), in the Río de la Plata, Argentina

G. Breckon, G. Darrigran, M. Maroñas, 2003, Hydrobiologia.