TY  - BOOK
AU  - Ybañez, Lydia Monzon.
TI  - Basic statistics.
SN  - 971-06-1602-1
AV  - F QA 276.12 Y29 1993 
PY  - 1993///
CY  - Quezon City
PB  - Phoenix Pub. House
KW  - Statistics
ER  -