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@book{zwinger1972land,
    title = {Land Above the Trees: A Guide to American Alpine Tundra},
    author = {Zwinger, Ann and Willard, Beatrice E.},
    isbn = {9780060148232},
    lccn = {72079702},
    url = {https://books.google.pl/books?id=m2PwAAAAMAAJ},
    year = {1972},
    publisher = {Harper \& Row},
    date-added = {2025-12-24 19:14:15 +0100}
}

@book{zwinger1972land, title = {Land Above the Trees: A Guide to American Alpine Tundra}, author = {Zwinger, Ann and Willard, Beatrice E.}, isbn = {9780060148232}, lccn = {72079702}, url = {https://books.google.pl/books?id=m2PwAAAAMAAJ}, year = {1972}, publisher = {Harper \& Row}, date-added = {2025-12-24 19:14:15 +0100} }