An Phu district Chau Doc province. Map before 1975
http://sharemap.org/mrfly911/An_Phu_district_Chau_Doc_province
Geospatial data sources: 

Republic of Vietnam maps 1965-1969 on Texas Tech University website - http://legacy.lib.utexas.edu/maps/topo/vietnam/vietnam_index.html
Open Street Map Data (ODbL) - http://www.openstreetmap.org/copyright
NORTAD - http://www.bts.gov/publications/north_american_transportation_atlas_data/
Natural Earth - http://www.naturalearthdata.com/
NASA/JPL-Caltech and U.S. Depart. of Agriculture, Farm Service Agency http://www.jpl.nasa.gov/
MapQuest - road map tiles http://www.mapquest.com/
Map For Free - relief map tiles http://www.maps-for-free.com/
mrfly911