TY  - BOOK
AU  - Azar, Betty Schrampfer 
TI  - Understanding and using English grammar Volume B
SN  - 0139587527
U1  - 428.5 A992u 
PY  - 1999///
CY  - Estados Unidos 
PB  - Logman
KW  - ADJECTIVE CLAUSES
KW  - GERUNDS AND INFINITIVES
KW  - ADVERB CLAUSES
ER  -