TY  - BOOK
AU  - Alexander,L.G
TI  - Practice and progress -Part 1: an integrated course for pre-intermediate students 
T2  - New concept english
SN  - 0582523273
AV  - PE 1128.A2 A35.1971
PY  - 1971///, ©1967
CY  - London
PB  - Longman
KW  - Inglés -
KW  - Libros de texto para extranjeros
N1  - Two-volume edition part I
ER  -