TY  - GEN
AU  - Allen,Harold B.
AU  - Campbell,Russell N.
TI  - Teaching English as a second language: a book of readings 
SN  - 0070010714
U1  - 420.7 
PY  - 1972///
CY  - New York
PB  - McGraw-Hill International Book
KW  - Lengua Inglesa
KW  - Estudio y Enseñanza
ER  -