The Swartkops Estuary. An Ecological Survey

(Port Elizabeth: The Zwartkops Trust, 1971). 246 x 160 mm; saddle-stitched pictorial wrappers; pp. (iv) + 42 + (ii); four maps; line drawings in text; two black-and-white photographs. Wrappers slightly rubbed; small penned mark to upper cover; moderate foxing throughout. Good condition. "This work was initiated by the Field Work Section of the Wild Life Protection and Conservation Society, under the enthusiastic leadership of a young amateur naturalist, Mr Karl Edwardes. Subsequently the information gathered was edited and supplemented by Trust members, including Dr. John Grindley, the Director of the Port Elizabeth, who provided scientific advice." - Introductory message. Chapter titles are as follows: The Lower Swartkops River; Vegetation; Plankton; Marine Animal Life; Fish and Fishing; Fresh Water Fish; Snakes of the Swartkops Estuary; The Waders of the Estuary; A Check List of the Birds of the Estuary. .