Botany & Horticulture in 1968

The Marine Algal Vegetation of St. Martin, St. Eustatius and Saba (Netherlands Antilles) by Vroman, M.

Plant Immunity: Biochemical Aspects of Plant Resistance to Parasitic Fungi by Ozeretskovskaia, Metlitskiĭ, L. V.

Molecular Genetics: 4. Wissenschaftliche Konferenz Der Gesellschaft Deutscher Naturforscher Und Ärzte Berlin 1967 by

Allgemeine Vegetationsgeographie by

Manual of the Vascular Flora of the Carolinas by Radford, Albert E., Bell, C. Ritchie, Ahles, Harry E.