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KP-1535-R2 - Klamath Project. Six-inch slide and folding rules used for comparison; August 29, 1947; Photo by Dorwin Grise; The slide-rule case bears the photographer's last name and initials: "D.E.Grise"
KP-1429-R2 - Klamath Project. Region II. Boundary Dam Materials Investigation; April 23, 1947; Photo by Dorwin Grise
KP-1436-R2 - Klamath Project. Region II. Boundary Dam Materials Investigation; April 23, 1947; Photo by Dorwin Grise
KP-1437-R2 - Klamath Project. Region II. Boundary Dam Materials Investigation; April 23, 1947; Photo by Dorwin Grise
KP-1438-R2 - Klamath Project. Region II. Boundary Dam Materials Investigation; April 23, 1947; Photo by Dorwin Grise
KP-1439-R2 - Klamath Project. Region II. Boundary Dam Materials Investigation; April 23, 1947; Photo by Dorwin Grise
KP-1440-R2 - Klamath Project. Region II. Boundary Materials Investigation; April 23, 1947; Photo by Dorwin Grise
KP-1441-R2 - Klamath Project. Region II. Boundary Dam Materials Investigation; April 23, 1947; Photo by Dorwin Grise
KP-1442-R2 - Klamath Project. Region II. Boundary Dam Materials Investigation; April 23, 1947; Photo by Dorwin Grise
KP-1443-R2 - Klamath Project. Region II. Boundary Dam Materials Investigation; April 23, 1947; Photo by Dorwin Grise