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Afghanistan : report on the afghan pamir
prepared by Ronald G. Petocz
Bok Språk ikke angitt 1978
Afghanistan : ecological reconnaissance of western nuristan with recommendations for management
prepared by Ronald G. Petocz and John Y. ...
Bok Språk ikke angitt 1977
Biostratigraphy and Lower Permian Fusulinidae of the Upper Delta River area, east-central Alaska Range
Petocz, Ronald G
Bok Engelsk 1970