by Charles A. Beard and Mary R. Beard. by Charles A. Beard. by Charles B. Breed and George L. Hosmer. by Charles A. Beard & Mary R. Beard; decorations by Wilfred Jones. (美)查尔斯·A. 比尔德(Charles A. Beard)，(美)玛丽·R. 比尔德(Mary R. Beard)著 by Charles A. Beard & Mary R. Beard, decorations by Wilfred Jones .. by Charles M. Parker .. by Charles A. Vergers. by Charles H. Bauer, M.D. by Charles J. Sippl and David A. Kidd.