TY  - BOOK
AU  - Mackin, Ronald.
TI  - Exercises in english patterns and usage
SN  - 0194327213
U1  - 428.24 
PY  - 1960///-
CY  - London
PB  - Oxford University Press
KW  - English language-Composition and exercises.-
N1  - v. 1, 2, and 3 has same title
ER  -