Key to the families of North American insects: an introduction to the classification of insects.
Boston: Author, 1915. Octavo, plates, publisher's cloth. More
Boston: Author, 1915. Octavo, plates, publisher's cloth. More
Cambridge MA: Bulletin of the Museum of Comparative Zoology at Harvard College, Volume 108, 1954. Octavo, text illustrations. Publisher's cloth, 'withdrawn' stamp. otherwise a very good copy. More