"Laramie strata in the Valley of Yellowstone River, Montana" (USA) [details]
"Laramie Group; valley of South Platte River; Northeastern Colorado" (USA) [details]
"Laramie Group; valley of South Platte River; Northeastern Colorado" (USA) [details]
"Laramie Group; valley of South Platte River; Northeastern Colorado" (USA) [details]
"Laramie Group; valley of South Platte River; Northeastern Colorado" (USA) [details]
"Strata of the Green River Eocene group near Washakie Station, in Southern Wyoming" (USA) [details]