1. Peters C. and BoydH., The calibration and dimensional changes of precision gage blocks. American Machinist, Oct. 7, (1920)
2. Bickersteth R., Temperature of adjustment for industrial standards of length. Machinery, Feb. 7, (1929)
3. The Editor, Special issue, commemorating Prof. Schlesinger's 25th anniversary as professor at the Technische Hochschule in Berlin, Loewe-Notizen, vol. 14, p 82, July (1929) transl. to Eng. by Dr. E. Loewen (1900)
4. Comite International Des Poids Et Mesures, Proces-Verbaux Des Seances Deuxieme Serie-Tome XIV Session De 1931 Libraires du Bureau Des Longitudes, De L'Ecole Polytechnique 55, Quai des Grands-Augustine, 55 Paris (1931)
5. Thermal and moisture expansion studies of some domestic granites;Hackman;J. Res. Nat'l Bur. Stds,1950