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Published in Ardea (01.01.2010)
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Published in Ibis (London, England) (01.04.1997)
Published in Ibis (London, England) (01.04.1997)
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DE1618914
ENGEL, WILLEM FREDERIK, KRIJGER, PIETER, HELDEN, ROBERT VAN, ALKEMA, HENK JOHAN
Year of Publication 06.02.1975
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Year of Publication 06.02.1975
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DE1618914
ENGEL, WILLEM FREDERIK, KRIJGER, PIETER, HELDEN, ROBERT VAN, ALKEMA, HENK JOHAN
Year of Publication 20.06.1974
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Year of Publication 20.06.1974
Patent