Robinson, William J, Bruce G Harrill, and Richard L Warren. 1975. Tree-Ring Dates From Arizona H-I Flagstaff Area. Tucson: University of Arizona.

Robinson, William J, and Bruce G Harrill. 1974. Tree-Ring Dates From Colorado V Mesa Verde Area. Tucson: University of Arizona.

Robinson, William J, Bruce G Harrill, and Richard L Warren. 1974. Tree-Ring Dates From New Mexico B Chaco-Gobernador Area. Tucson: University of Arizona.

Robinson, William J, Bruce G Harrill, and Richard L Warren. 1973. Tree-Ring Dates From New Mexico J-K,p,v Santa Fe-Pecos-Lincoln Area. Tucson: University of Arizona.

Robinson, William J, John W Hannah, and Bruce G Harrill. 1972. Tree-Ring Dates From New Mexico I,o,u Central Rio Grande Area. Tucson: University of Arizona.