Columbia subject headings:
Geological maps.
Geology--Mexico--Oaxaca (State)--Maps.
Geology--Mexico--Sierra Madre del Sur--Maps.
Maps.
Sierra Madre del Sur (Mexico)--Maps.
Harvard subject headings:
Geological maps.
Geology--Mexico--Sierra Madre--Maps.
Sierra Madre (Mexico)--Maps.
Princeton subject headings:
Geological cross-sections
Geological maps.
Geology--Mexico--Oaxaca (Mexico : State)--Maps.
Geology--Mexico--Puebla (Mexikco : State)--Maps.
Geology--Mexico--Sierra Madre del Sur--Maps.
Maps.
Oaxaca (Mexico : State)--Maps.
Puebla (Mexico : State)--Maps.
Sierra Madre del Sur (Mexico)--Maps.