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552 (828.6) (047) (9) |
Chubut (Argentina) (9) |
petrografía (9) |
Cerro Piedra Negra (Chubut, Argentina) (3) |
Gastre (Chubut, Argentina) (2) |
Puerto Madryn (Chubut, Argentina) (2) |
arcilla (1) |
caolín (1) |
Chasicó (Río Negro, Argentina) (1) |
difractometría de rayos X (1) |