Male
Engineer
From San Diego, CA. Sometimes (mis)spelled as Harshberger. In PSA Journal in1968 he was listed as being from Colton, California.
PSA Journal, Oct. 1961, 48. PSA Journal, Oct. 1963, 41. PSA Journal, Sept. 1964, 49. PSA Journal, Sept. 1966, 33. PSA Journal,Oct. 1968, 47. PSA Journal, Nov. 1969, 53, 54. PSA Journal, Nov. 1970, 39.
A PhD dissertation can be found at the California Institute of Technology, Division of Engineering and Applied Science, by a Frederick Clay Harshbarger suggesting that Harshbarger was a mechanical engineer by profession.