Whoever, without authority, with the intention of depriving the library or archive of the ownership of such property, willfully conceals a book or other library or archive property, while still on the premises of such library or archive, or willfully or without authority removes any book or other property from any library or archive or collection shall be deemed guilty of a misdemeanor and upon conviction shall be punished in accordance with the following: (1) by a fine of not more than six hundred dollars or imprisonment for not more than six months; provided, however, that if the value of the library or archive property is less than fifty dollars, the punishment shall be a fine of not more than one hundred dollars or imprisonment for not more than thirty days. Proof of the willful concealment of any book or other library or archive property while still on the premises of such library or archive shall be prima facie evidence of intent to commit larceny thereof.