Schell, Robert E. Letters and sounds : a manual for reading instruction / Robert E. Schell. - Englewood Cliffs, N.J. : Prentice-Hall, 1972. - xliii, 125 p. ; ISBN: 0135319471 Subjects--Topical Terms: Reading--Handbooks, manuals, etc. Dewey Class. No.: 372.4 / Le