City plan, Columbus, Georgia / John Nolen, city planner, Hale J. Walker, Justin R. Hartzog, associates.Columbus (Ga.). City Planning Board.1926
Connection tables from Wiswesser chemical structure notations--a partial algorithm George F. Fraction, Justin C. Walker and Stephen J. Tauber.George F. Fraction1968
Reading region reconnaissance survey; basic requirements of a regional plan, 1930; prepared for the community Council of Berks County, Pennsylvania ... John Nolen ... Hale J. Walker Justin R. Hartzog ...Community Council of Berks County, Pa.1930
