John W. Ritchie, Elizabeth M. Ritchie & Chapin W. Day.
Biology and human affairs; new edition.
R628042. Biology and human affairs; new edition. By John W. Ritchie, Elizabeth M. Ritchie & Chapin W. Day. NM: revisions & compilation. © 8Mar48; A22231. Elizabeth H. Ritchie & Chapin W. Day (A); 8Mar76; R628042.
Elizabeth H. Ritchie & Chapin W. Day|A