Books by C. E. Schäffer

Progress in Theory

by P. v. Herigonte, D. W. Smith, U. Mayer, V. Gutmann, J. C. Speakman, S. E. Harnung, C. E. Schäffer

1972

Laboratory Manual to Accompany En Directo!

by Martha E. Schaffer, Patricia C. Boylan, Dorothy A Rissel, John A Left, Maria Morris

1994

Workbook to Accompany En Directo! A Beginning Course, 2nd Edition

by Lee Ann Grace, Patricia C. Boylan, Dorothy A Rissel, John A Left, Martha E Schaffer, Mayra Portillo Zeleny

1994