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San German (PR)

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Survey type M-Dz (magnetic; digitized from contour maps)
Flown by Canadian Aero Service Ltd.
Date flown ?/57
Line spacing 0.4 (km)
Altitude 153 (m) above ground
Total distance 563 (km)
References
Bawiec, Walter J., 1998, Geology, Geochemistry, Geophysics, Mineral Occurrences and Mineral Resource Assessment for the Commonwealth of Puerto Rico; Open-File Report 98-38

https://pubs.usgs.gov/of/1998/of98-038/
Counties Lajas - Maricao - Sabana Grande - San German