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by Gerhard Sonnert and Gerald Holton
by Sengerling, Rainer; Holton, Gerald
by Cassidy, David; Holton, Gerald; Rutherford, James
by Sonnert, Gerhard; Holton, Gerald
by Holton, Gerald James; Brush, Stephen G.
by Sonnert, Gerhard; Holton, Gerald James
by Holton, Gerald
by David Cassidy; Gerald Holton; F.James Rutherford
by David C. Cassidy; Gerald Holton; F. James Rutherford