. Die geographische Verbreitung der Oligochaeten. Oligochaeta -- Geographical distribution. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Michaelsen, W. (Wilhelm), 1860-1937. Berlin : R. Friedländer
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherberli, bookyear1903