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1954 August [photographs, gelatin silver Head of Quebrada Cojup, Peru Ayres, Fred D., photographer |
1954 August [photographs, gelatin silver Quebrada Cojup moraine, Peru Ayres, Fred D., photographer |
1954 August [photographs, gelatin silver Quebrada Cojup boulder flow, … Ayres, Fred D., photographer |
1954 August [photographs, gelatin silver Quebrada Cojup lower portion … Ayres, Fred D., photographer |