"Judith River Formation." . . "Montana." . . "Paleobotánica Estados Unidos Montana Cretácico." . . "Paleobotany." . . . . . . . . . . . . "Palynology of the upper Campanian <Creataceous> Judith River Formation, north-central Montana" . . . . . . . . "Palynology of the upper Campanian (Cretaceous) Judith River formation, north-central Montana" . . . . "Additional title page description: Identification of fossil pollen and spores in rocks from the type area." . . "Palynology of the upper campanian (cretaceous) Judith River formation, North-Central Montana : identification of fossil pollen and spores in rocks from the type area" . . . . . . . "Palynology of the upper Campanian (Cretaceous) Judith River Formation, north-central Montana" . . . . "Polen fósil Estados Unidos Montana." . . "Paleobotany Cretaceous." . . "Palynology Montana." . . "Esporas fósiles (Botánica) Estados Unidos Montana." . . . . "From 65 to 140 million years ago" . . "Geological Survey (U.S.)," . . "Cretaceous Geologic Period." . . "Palynology." . .