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petrologie uhelná
petrologie uhlí
petrology
petrology history
petrophysical properties
petrophysics
petrurgický čedič
Petřín Hill (Prague)
Petřkovice Mbr.
pevnost
Pg waves
PGE
pH
pH-dependent
Phacopida
Phanerozoic
pharmacosiderite
phase carbon forms
phase detection
phase synchronization