Any person who, without authority and with the intention of depriving the public library of the ownership of such property, willfully conceals a book or other public library property, while still on the premises of such public library, or willfully or without authority removes any book or other property from any public library shall be guilty of a misdemeanor; provided, however, that, if the replacement cost of the public library property is less than $25.00, the punishment shall be a fine of not more than $250.00. Proof of the willful concealment of any book or other public library property while still on the premises of such public library shall be prima-facie evidence of intent to violate this Code section.