Kellerman, W. A., Gleason, H. A., & Schaffner, J. H. (1914). Spring flora for beginners and amateurs: Consisting of descriptions of the early flowering herbaceous and woody plants, with simple keys for their identification; also a key for the identification of trees and shrubs based on leaf and twig characters. Being a new edition of W.A. Kellerman's Spring flora of Ohio, revised and extended so as to cover the area of Ohio, Indiana and adjacent states (3d. ed.). G.W. Tooill.

Kellerman, W. A., Henry A. Gleason, e John H. Schaffner. Spring Flora for Beginners and Amateurs: Consisting of Descriptions of the Early Flowering Herbaceous and Woody Plants, with Simple Keys for Their Identification; Also a Key for the Identification of Trees and Shrubs Based on Leaf and Twig Characters. Being a New Edition of W.A. Kellerman's Spring Flora of Ohio, Revised and Extended so as to Cover the Area of Ohio, Indiana and Adjacent States. 3d. ed. Columbus, O: G.W. Tooill, 1914.

Kellerman, W. A., et al. Spring Flora for Beginners and Amateurs: Consisting of Descriptions of the Early Flowering Herbaceous and Woody Plants, with Simple Keys for Their Identification; Also a Key for the Identification of Trees and Shrubs Based on Leaf and Twig Characters. Being a New Edition of W.A. Kellerman's Spring Flora of Ohio, Revised and Extended so as to Cover the Area of Ohio, Indiana and Adjacent States. 3d. ed. G.W. Tooill, 1914.