LINGO LIBRARY · 26542On The Affinities of Leptarctus primus of Leidy American Museum of Natural History, Vol. VI, Article VIII, pp. 229-331.✳Wortman, Jacob LawsonENB1 · EstimatedOn The Affinities of Leptarctus primus of Leidy American Museum of Natural History, Vol. VI, Article VIII, pp. 229-331.Wortman, Jacob Lawson
