参考文献
外部链接
- USGS Hydrologic Unit Map – Caribbean Region (1974)
- [http://www.prfrogui.com/geocities/rios.htm Rivers of Puerto Rico]
- [http://pubs.usgs.gov/sim/2005/2818/pdf/sim_I2818.pdf USGS Maps of Municipality of Ponce Rivers, showing Rio Cerrillos and others]
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