1950
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| 1951
- Viktor Hamburger, President
- Richard H. Goodwin, Secretary
- Lindsay M. Black, Treasurer
- Elmer G. Butler
- Edward W. Shrigley
- Ralph H. Wetmore
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1952
ELEVENTH SYMPOSIUM
- E.G. Butler, President
- Richard H. Goodwin, Secretary
- Louis G. Nickell, Treasurer
- E.J. Boell
- Viktor Hamburger
- Ralph H. Wetmore
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| 1953
TWELFTH SYMPOSIUM
- E.J. Boell, President
- Richard H. Goodwin, Secretary
- Louis G. Nickell, Treasurer
- E.G. Butler
- David R. Goddard
- Victor C. Twitty
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1954
THIRTEENTH SYMPOSIUM
- David R. Goddard, President
- Mac V. Edds, Jr., Secretary
- Louis G. Nickell, Treasurer
- E.G. Boell
- John T. Bonner
- Victor C. Twitty
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| 1955
FOURTEENTH SYMPOSIUM
- Victor C. Twitty, President
- Mac V. Edds, Jr., Secretary
- Robert W. Briggs, Treasurer
- John Tyler Bonner
- Harriet B. Creighton
- David R. Goddard
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1956
FIFTEENTH SYMPOSIUM
- Kenneth V. Thimann, President
- Mac V. Edds, Jr., Secretary
- Robert W. Briggs, Treasurer
- John Tyler Bonner
- Harriet B. Creighton
- James D. Ebert
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| 1957
SIXTEENTH SYMPOSIUM
- Gerhard Frankhauser, President
- Ralph O. Erickson, Secretary
- Robert W. Briggs, Treasurer
- Dorothea Rudnick, Editor
- Harriet B. Creighton
- James D. Ebert
- Kenneth V. Thimann
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1958
SEVENTEENTH SYMPOSIUM
- James D. Ebert, President
- Ralph O. Erickson, Secretary
- Edgar Zwilling, Treasurer
- Dorothea Rudnick, Editor
- Gerhard Frankhauser
- Folke K. Skoog
- Kenneth V. Thimann
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| 1959
EIGHTEENTH SYMPOSIUM
- Ralph O. Erickson, President
- William R. Jacobs, Secretary
- Edgar Zwilling, Treasurer
- Dorothea Rudnick, Editor
- Dietrich Bodenstein
- Gerhard Frankhauser
- Folke K. Skoog
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