CLARK, JOHN R.
Clark-Otis modern-school arithmetic. 3d-6th grades, 2d pt. By John R. Clark and Arthur S. Otis, assisted by M. Caroline Hatton. Experimental ed.
CLARK, JOHN R. Clark-Otis modern-school arithmetic. 3d-6th grades, 2d pt. By John R. Clark and Arthur S. Otis, assisted by M. Caroline Hatton. Experimental ed. © 7Feb28; A1061904-1061907. John R. Clark & Arthur Sinton Otis (A); 25Nov55; R159764-159767.
John R. Clark & Arthur Sinton Otis|A