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Havelock, Th.H. (author)
journal article 1909
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Gerritsma, J. (author)
conference paper 1954
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Gerritsma, J. (author)
journal article 1961
document
Gerritsma, J. (author), Beukelman, W. (author)
journal article 1963
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Gerritsma, J. (author)
journal article 1963
document
Gerritsma, J. (author), Beukelman, W. (author)
journal article 1963
document
Davis, M.C. (author)
conference paper 1964
document
book 1964
document
Gerritsma, J. (author)
journal article 1965
document
Gerritsma, J. (author)
journal article 1965
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Gerritsma, J. (author)
journal article 1965
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Gerritsma, J. (author)
journal article 1965
document
Johnsson, C.A. (author)
conference paper 1966
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Suarez, A. (author)
conference paper 1969
document
Cleary, W.A. (author)
other
document
Glansdorp, C.C. (author)
journal article 1972
document
Glansdorp, C.C. (author)
book 1982
document
Keuning, Lex J.A. (author)
journal article 1984
document
Keuning, Lex J.A. (author)
journal article 1985
document
Capin, John R. (author)
other 1987
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