Recent activity of glaciers of Mount Rainier, WashingtonRobert Sumner Sigafoos · First published 1973Open the Tome
Botanical evidence of floods and flood-plain depositionRobert Sumner Sigafoos · First published 1964Open the Tome
Botanical evidence of the modern history of Nisqually Glacier, WashingtonRobert Sumner Sigafoos · First published 1961Open the Tome
Vegetation of northwestern North America, as an aid in interpretation of geologic dataRobert Sumner Sigafoos · First published 1958Open the Tome
Soil instability on slopes in regions of perenially-frozen groundRobert Sumner Sigafoos, David Moody Hopkins · First published 1952Open the Tome
Post-Wisconsin forest migration in North-western Montana, Central Alberta and the Athabaska and Great Slave Lake RegionsRobert Sumner Sigafoos · First published 1950Open the Tome
