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[en] [Gutenberg 56303] • Agate Fossil Beds National Monument, Nebraska
United States. National Park Service
[en] [Gutenberg 26542] • On The Affinities of Leptarctus primus of Leidy / American Museum of Natural History, Vol. VI, Article VIII, pp. 229-331.
Wortman, Jacob Lawson
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![[Gutenberg 26542] • On The Affinities of Leptarctus primus of Leidy / American Museum of Natural History, Vol. VI, Article VIII, pp. 229-331.](/cover/ENV7d9lPJJhEoF6P/small/[Gutenberg%2026542]%20%e2%80%a2%20On%20The%20Affinities%20of%20Leptarctus%20primus%20of%20Leidy%20/%20American%20Museum%20of%20Natural%20History,%20Vol.%20VI,%20Article%20VIII,%20pp.%20229-331..jpg)