def get_temperature_rise_spec_sheet(page_number: int) -> float:
    """Retrieve the temperature rise based on the spec sheet from MIL-C-39010.

    :param page_number: the spec sheet to retrieve the temperature rise
        for.
    :return: _temperature_rise; the spec sheet temperature rise.
    :rtype: float
    :raise: KeyError if an unknown spec sheet is passed.
    """
    return {
        1: 15.0,
        2: 15.0,
        3: 15.0,
        4: 35.0,
        5: 15.0,
        6: 35.0,
        7: 15.0,
        8: 35.0,
        9: 15.0,
        10: 15.0,
        11: 35.0,
        12: 35.0,
        13: 15.0,
        14: 15.0,
    }[page_number]