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    Guide for the care and use of laboratory animals /

    Izdano 2011
    Polni tekst
    National Academies Press
    Knjiga
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    Improving fish stock assessments

    Izdano 1998
    An electronic book accessible through the World Wide Web; click to view
    Elektronski eKnjiga
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    Science and the national parks

    Izdano 1992
    An electronic book accessible through the World Wide Web; click to view
    Elektronski eKnjiga