Robert Yarnall Ritchie, 1949, [Refinery towers, Gulf Oil Corporation], Gelatin silver print, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47019

Robert Yarnall Ritchie, 1938, [View from drilling floor, Reed Roller Bit Company], Gelatin silver print, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47016

Robert Yarnall Ritchie, 1949, [View from the drilling floor of roughnecks removing collars and bit from the traveling block, Superior Oil Company], Gelatin silver print, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47021

Robert Yarnall Ritchie, 1950, [Ore docks, Bethlehem Steel Corporation], Gelatin silver print, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47022

Robert Yarnall Ritchie, 1951, [Gas processing system towers, Dollarhide Plant, Pure Oil Company], Gelatin silver print, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47023

Robert Yarnall Ritchie, 1951, [Finished product pipelines, Dollarhide Plant, Pure Oil Company], Gelatin silver print, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47024

Robert Yarnall Ritchie, 1955, [Navy Convair turbo prop], Gelatin silver print, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47027

Robert Yarnall Ritchie, 1956, [Taking the temperature readings, Olin Mathieson Company], Gelatin silver print, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47028

Robert Yarnall Ritchie, 1949, [Operator checking tanks, Sun Oil], Gelatin silver print, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47018

Robert Yarnall Ritchie, 1955, [B-36 engines, Schlumberger], Gelatin silver print, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47026

Robert Yarnall Ritchie, 1938-1942 (ca), [Drilling rig at night, Halliburton], Gelatin silver print, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47017

Robert Yarnall Ritchie, 1960-1984 (ca), [Ship in drydock], Colour film transparency, 12.2 x 10 cm, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47036

Robert Yarnall Ritchie, 1971, [World Trade Center from plaza, New York City], Colour film negative, 12.7 x 7.6 cm, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47038

Robert Yarnall Ritchie, 1964, December, Holiday decorations, Channel Gardens, Rockefeller Center], Colour film transparency, 12.2 x 10 cm, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47037

Robert Yarnall Ritchie, 1947, Train of Tomorrow, Colour film transparency, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47020

Robert Yarnall Ritchie, 1954, [Operator checking pipeline manifold, Dollarhide Plant, Pure Oil Company], Colour print, 33.1 x 25.7 cm, DeGolyer Library, South Methodist University - SMU, SMU - Robert Yarnall Richie Photograph, Call Number : Ag1982.0234, LL/47029