EVERY writer of text-books is faced by the difficulty that the science of which he treats inosculates with and is overlapped by other branches of science. One of his most important tasks, therefore, ...
Biogeographie, Wissenschaft von der gegenwärtigen und früheren Verbreitung von Pflanzen und Tieren auf der Erdoberfläche einschließlich der Prozesse, die diese Verbreitungsmuster erzeugen.
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