LAPP, C. J.
Mathematics for the emergency, by C. J. Lapp, F. B. Knight & H. L. Rietz. NM: additions & revisions.
LAPP, C. J. Mathematics for the emergency, by C. J. Lapp, F. B. Knight & H. L. Rietz. NM: additions & revisions. © 8Dec42; AA416555. Scott, Foresman & Co. (PWH); 15Dec69; R474859.
Scott, Foresman & Co.|PWH