What is "isabela zona"

Population (2000): 12818
Housing Units (2000): 5012
Land area (2000): 2.626037 sq. miles (6.801404 sq. km)
Water area (2000): 0.530041 sq. miles (1.372800 sq. km)
Total area (2000): 3.156078 sq. miles (8.174204 sq. km)
FIPS code: 36478
Located within: Puerto Rico (PR), FIPS 72
Location: 18.499946 N, 67.022934 W
ZIP Codes (1990):
Note: some ZIP codes may be omitted esp. for suburbs.
Headwords: