Notes about some in Finland found species of non-parasitical worms : (Turbellaria, Discophora, et Oligochaeta fennica) / by Axel R. Spoof Spoof, Axel R[einhold], 1845- creator text book Åbo Printed for the author 1889 1889
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ENG Finland Leeches Oligochaeta Turbellaria Worms Museum of Comparative Zoology--Biodiversity Heritage Library digitization project https://www.biodiversitylibrary.org/bibliography/46803 80087025 10.5962/bhl.title.46803 HMZ