✓

@book{book_881832,
    title = {Foundations of Infinitesimal Calculus},
    author = {H. Jerome Keisler},
    publisher = {},
    isbn = {},
    year = {2011},
    series = {},
    edition = {},
    volume = {},
    url = {http://gen.lib.rus.ec/book/index.php?md5=2accfe1602de4b63e5abc5532cda8478},
    date-added = {2024-5-11 8:0:1 +0100}
}

@book{book_881832, title = {Foundations of Infinitesimal Calculus}, author = {H. Jerome Keisler}, publisher = {}, isbn = {}, year = {2011}, series = {}, edition = {}, volume = {}, url = {http://gen.lib.rus.ec/book/index.php?md5=2accfe1602de4b63e5abc5532cda8478}, date-added = {2024-5-11 8:0:1 +0100} }