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No. 21. Negros.
1054.021
pilot4
No. 21. Negros. Islas Filipinas Observatorio de Manila. United States Coast and Geodetic Survey. No. 21. Longitud E. del Meridiano de Greenwich. A. Hoen & Co., Baltimore. (1899)
1899
U.S. Coast and Geodetic Survey
30 × 36 cm
1 : 665000