Three works on algae, inscribed by American and German botanists.
Various places and publishers: 1879-20. 3 vols. § Three works on algae published between 1879 and 1920, all inscribed by the author or from one botanist to another, the collection illustrating the collegiality of American and German botanists. 1) Engler, Adolf and Karl Prantl. Die natürlichen Pflanzenfamilien - nebst ihren..... More