230 BELL SYSTEM TECHNICAL JOURNAL 



15. "Equivalent Single-Phase Networks for Calculating Short-Circuit Currents Due 



to Grounds on Three-Phase Star Grounded Systems," R. A. Shetzline, 



A. I. E. E. Trans., 1924, \'ol. 43, pp. 875-883. 



16. "Calculation of Short-Circuit Ground Currents on Three-Phase Power Networks, 



Using the Method of Symmetrical Components," S. Bekku, G. E. Review, 

 Vol. 28, July 1925, pp. 472-478. 



17. "Calculation of Sin^de-Phase Short Circuits by the Method of Symmetrical Com- 



ponents," A. P. Mackerras, G. E. Rei'ie^v, Vol. 29, April 1926, pp. 218-231; 

 July 1926, pp. 468-481. 



18. "Characteristics of Ground Faults on Three-Phase Systems," S. B. Griscom, 



Electric Journal, Vol. 24, April 1927, pp. 151-156. 



19. "Transmission Line Engineering," W. W. Lewis, McGraw-Hill Book Company, 



1928, particularly chapters VI, VIII and X. 



20. "Symmetrical Components." C. F. Wagner and R. D. Evans, Electric Journal, 



Part I, Mar. 1928, p. 151; Part II, April 1928, p. 194; Part III, June 1928, p. 

 307; Part IV, July 1928, p. 359; Part V, Sept. 1929, p. 425; Part VI, Dec. 1929, 

 p. 571. 



21. "Finding Single- Phase Short-Circuit Currents on Calculating Boards," R. D. 



Evans, Elect. World, Vol. 85, April 11, 1925, pp. 760-765. 



22. "An Alternating-Current Calculating Board," H. A. Travers and W. W. Parker, 



Electric Journal, May 1930, Vol. 27, p. 266. 



23. "The M. I. T. Network Analyzer — Design and Application to Power System 



Problems," H. L. Hazen, O. R. Schurig and M. F. Gardner, A. I. E. E. Trans., 

 July 1930, Vol. 49, p. 1102. 



24. " Unterdriickung des Aussetzenden Erdschlusses durch Null Widerstande und 



Funken Ableiter," \V. Petersen, E. T. Z., August 1918. 



25. "Die Begranzung des Erdschlusstromes und die Unterdruckung des Erdschluss- 



lichtbogens durch die Erdschlusspule," W. Petersen, E.T.Z., January 1919. 



26. "The Petersen Earth Coil," R. N. Conwell and R. D. Evans, A. I. E. E. Trans., 



1922, Vol. 41, pp. 77-93. 



27. "The Relation of the Petersen System of Grounding Power Networks to In- 



ductive Effects in Neighboring Communication Circuits," H. M. Trueblood, 

 Bell System Technical Journal, 1922, Vol. I, pp 39-59. 



28. "Arcing Grounds and Effect of Neutral Grounding Impedance," [. E. Clem, 



A. LE. E. Trans., 1930, Vol. 49, No. 3, pp. 970-989. 



29. "Grounding Banks of Transformers with Neutral Impedance and the Resultant 



Transient Conditions in the Windings," F. J. Vogel and J. K. Hodnette, 

 /I. /.£.£. /owrwa/, October 1930, pp. 838-841. 



30. "Uber die Schutzwirkung des Kabelmantels bel Induktionsbeelnflussungen von 



Schwachstromkabeladern durch Starkstromleltungen," G. Grause and A. 

 Zastrow, WissenschaftlicJw Veroffentlichungen aus dem Siemens-Konzern, 

 Germany, 1922, Vol. 2, pp. 422H135, Abstract In Elektrotech. u. Maschinen- 

 bau, 2/4/23, Vol. 41, p. 95. 



31. "The Pupin Cable Along the Electric Railwav Line — Schopfheim-Saeckingen," 



W. Rihl, Siemens-Schuckert Review, 1927, Vol. Ill, p. 169. 



32. American Committee on Inductive Coordination — "Bibliography on Inductive 



Coordination," Published by the American Committee on Inductive Coordina- 

 tion, Jan. 1, 1925. 



