TY  - BOOK
AU  - Leigh, Robert,
AU  - Liu, Chiang-Fung Andrew.,
TI  - Hungarian problem Book IV
T2  - MAA problem books series
SN  - 9780883858318
U1  - 510  LEI 
PY  - 2011///
CY  - Washington
PB  - Mathematical Association of America
KW  - Mathematics
KW  - Mathematics -- Problems, exercises, etc
ER  -