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| | AllRefer.com - Isabela, province, Philippines (Southeast Asia Political Geography) - Encyclopedia |
 | | AllRefer.com - Isabela, province, Philippines (Southeast Asia Political Geography) - Encyclopedia |
 | | The fertile Cagayan River valley, which is in the central and eastern part of the province, is a leading tobacco- and cacao-producing region. |
 | | The rugged Sierra Madre on the east is mineral rich; iron, nickel, and copper deposits, as well as the nation's major manganese mines, are there. |
| reference.allrefer.com /encyclopedia/I/IsabelaPhi.html (157 words) |
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