This sub-series contains files related to Bartle's employment and consulting in oil and gas exploration. Files include correspondence, reports, maps, data, and photographs of drilling sites. Additional files about oil and gas exploration can be found in the map sets sub-series.

This sub-series documents Bartle's attendance at four of the International Geological Congress conferences. Files include programs, schedules of activities, travel plans, correspondence, and academic articles.

There are several commemorative pins from the conferences in the memoribilia series.

This sub-series documents Bartle's attendance at four of the International Geological Congress conferences. Files include programs, schedules of activities, travel plans, correspondence, and academic articles.

There are several commemorative pins from the conferences in the memoribilia series.

This sub-series documents Bartle's attendance at four of the International Geological Congress conferences. Files include programs, schedules of activities, travel plans, correspondence, and academic articles.

There are several commemorative pins from the conferences in the memoribilia series.

This sub-series documents Bartle's attendance at four of the International Geological Congress conferences. Files include programs, schedules of activities, travel plans, correspondence, and academic articles.

There are several commemorative pins from the conferences in the memoribilia series.

This sub-series contains records documenting Bartle's academic career, including personnel reports and curiculum vitae.

This sub-series contains records documenting Bartle's academic career, including personnel reports and curiculum vitae.

This sub-series contains records documenting Bartle's academic career, including personnel reports and curiculum vitae.