TY  - BOOK
AU  - à¸¨à¸£à¸µà¸à¸§à¸¥ à¹à¸à¸µà¸¢à¸à¸±à¸à¸à¸£à¹à¸à¸à¸©à¹
TI  - Progressive english structures  : à¹à¸§à¸¢à¸²à¸à¸£à¸à¹à¸­à¸±à¸à¸à¸¤à¸©à¸à¸à¸±à¸à¸ªà¸¡à¸à¸¹à¸£à¸à¹
AV  - PE1128 à¸¨213 à¸9 2530
PY  - 2530///
CY  - à¸à¸£à¸¸à¸à¹à¸à¸à¸¯
PB  - à¸£à¸¸à¹à¸à¹à¸ªà¸à¸à¸²à¸£à¸à¸´à¸¡à¸à¹
KW  - à¸ à¸²à¸©à¸²à¸­à¸±à¸à¸à¸¤à¸©
KW  - à¸à¸²à¸£à¹à¸à¹à¸ à¸²à¸©à¸²
KW  - à¸à¸²à¸£à¸¨à¸¶à¸à¸©à¸²à¹à¸¥à¸°à¸à¸²à¸£à¸ªà¸­à¸
ER  -