"Sonoma County Fairgrounds (Santa Rosa, Calif.)" . . . . "California Centaurs" . . "Sonoma County Junior Riding and Driving Club." . . . . . "Aerial photographs" . "Left to right Donnie Ford, Sam Wood, Frank Devencenzi." . . "[Donnie Ford, Sam Wood, and Frank Devencenzi of the California Centaurs mounted junior drill team at the Sonoma County Fairgrounds, Santa Rosa, Calif., 1946]" . . . . . . . . . .