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- report 1969
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- Woodward, John B. (author) report 1968
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- de Mooy, A. (author) report 1967
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- Visser, N.J. (author) report 1967
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- van Staveren, P. (author) report 1967
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- Astrup, N.Chr. (author) report 1966
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- report 1965
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- Mogin, R. (author) report 1964
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- de Mooy, A. (author) report 1964
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- Abrahamsen, E. (author) report 1962
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- Thompson, Warren C. (author) report 1960
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- Visser, H. (author) report 1959
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- Argyriadis, D.A. (author) report 1957
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- Bunyan, T.W. (author) report 1957
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- Visser, H. (author) report 1954
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- Johansen, Helge (author) report 1954
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- Astrup, N.Chr. (author) report 1952
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- Visser, H. (author) report 1952
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- Astrup, N.Chr. (author) report 1951
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- Astrup, N. Chr. (author), Sund, Eystein (author) report 1951