Rock, Joseph Francis Charles, 1884-1962.(Lancaster, Pa. : Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1918-05)
Rock, Joseph Francis Charles, 1884-1962.(Lancaster, Pa. : Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1919-02)
Rock, Joseph Francis Charles, 1884-1962.(Lancaster, Pa. : Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1919-05)
Rock, Joseph Francis Charles, 1884-1962.([Lawrence, KS : Torrey Botanical Club] / Rock, Joseph Francis Charles, 1884-1962. Hawaiian botanical papers ; no. 13, 1918-08-10)
Rock, Joseph Francis Charles, 1884-1962.(Lancaster, Pa. : Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1917-12)