American fern journal - American Fern Society. (American Fern Society, 1922)

American fern journal - American Fern Society. (American Fern Society, 1925)

American fern journal - American Fern Society. (American Fern Society, 1928)

American fern journal - American Fern Society. (American Fern Society, 1931)

American fern journal - American Fern Society. (American Fern Society, 1932)

American fern journal - American Fern Society. (American Fern Society, 1933)

American fern journal - American Fern Society. (American Fern Society, 1934)

American fern journal - American Fern Society. (American Fern Society, 1935)

American fern journal - American Fern Society. (American Fern Society, 1937)

American fern journal - American Fern Society. (American Fern Society, 1938)

American fern journal - American Fern Society. (American Fern Society, 1939)

American fern journal - American Fern Society. (American Fern Society, 1940)

American fern journal - American Fern Society. (American Fern Society, 1942)

American fern journal - American Fern Society. (American Fern Society, 1944)

American fern journal - American Fern Society. (American Fern Society, 1945)

American fern journal - American Fern Society. (American Fern Society, 1946)

American fern journal - American Fern Society. (American Fern Society, 1947)

American fern journal - American Fern Society. (American Fern Society, 1948)

American fern journal - American Fern Society. (American Fern Society, 1949)

American fern journal - American Fern Society. (American Fern Society, 1950)

American fern journal - American Fern Society. (American Fern Society, 1951)

American fern journal - American Fern Society. (American Fern Society, 1952)

American fern journal - American Fern Society. (American Fern Society, 1953)

American fern journal - American Fern Society. (American Fern Society, 1954)

American fern journal - American Fern Society. (American Fern Society, 1955)

American fern journal - American Fern Society. (American Fern Society, 1956)

American fern journal - American Fern Society. (American Fern Society, 1957)

American fern journal - American Fern Society. (American Fern Society, 1959)

American fern journal - American Fern Society. (American Fern Society, 1960)

American fern journal - American Fern Society. (American Fern Society, 1963)

American fern journal - American Fern Society. (American Fern Society, 1964)

American fern journal - American Fern Society. (American Fern Society, 1965)

American fern journal - American Fern Society. (American Fern Society, 1966)

American fern journal - American Fern Society. (American Fern Society, 1967)

American fern journal - American Fern Society. (American Fern Society, 1968)

American fern journal - American Fern Society. (American Fern Society, 1970)