In 1904 Rhode Island became the second state, joining Massachusetts, to issue its own license plates, and the states of Iowa and Maryland began to require owners to provide their own license plates. [1][2][3][4]
^Fox, Jams K. (1997). License Plates of the United States: A Pictorial History 1903-To the Present. Jerico, New York: Interstate Directory Publishing Company. ISBN9781886777002.
^Minard, Jeff; Stentiford, Tim (2004). A Moving History, 50 Years Of ALPCA. 100 Years Of License Plates. Paducah, Kentucky: Turner Publishing Company. p. 58. ISBN1-56311-975-7.