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Balhan, J. (author) report 1955
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Balhan, Dr.ir. J. (author), Gerritsma, J. (author) report 1954
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Balhan, Dr.ir. J. (author), Gerritsma, J. (author) report 1954
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Balhan, J. (author) journal article 1953
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Balhan, J. (author) public lecture 1953
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Balhan, J. (author) report 1953
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Balhan, J. (author) journal article 1952
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Balhan, J. (author) doctoral thesis 1951
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Balhan, J. (author) doctoral thesis 1951
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Balhan, J. (author) journal article 1950
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Balhan, J. (author) journal article 1949
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Balhan, J. (author) journal article 1949