المؤلفون: Cleveland, Bruce T., Daily, Timothy, Davis, Raymond, Distel, James R., Lande, Kenneth, Lee, C. K., Wildenhain, Paul S., Ullman, Jack

المصدر: The Astrophysical Journal; March 1998, Vol. 496 Issue: 1 p505-526, 22p

المؤلفون: Lande, Kenneth, Mann, Alfred K., White, D. Hywel

المصدر: Review of Scientific Instruments; August 1962, Vol. 33 Issue: 8 p828-831, 4p