Bulletin - Colorado Agricultural Experiment Station (Colorado State University Experiment Station, 1887)

Bulletin - National Museum of Canada. (National Museum of Canada, 1950)

Bulletin - National Museum of Canada. (National Museum of Canada, 1957)

Bulletin - National Museum of Canada. (National Museum of Canada, 1958)

Bulletin - British Pteridological Society. (the Society, 1973)

Bulletin - British Pteridological Society. (the Society, 1979)

Bulletin - British Pteridological Society. (the Society, 1980)

Bulletin - British Pteridological Society. (the Society, 1981)

Bulletin - British Pteridological Society. (the Society, 1982)

Bulletin - British Pteridological Society. (the Society, 1983)

Bulletin - British Pteridological Society. (the Society, 1984)

Bulletin - British Pteridological Society. (the Society, 1985)

Bulletin - British Pteridological Society. (the Society, 1986)

Bulletin - British Pteridological Society. (the Society, 1987)

Bulletin - British Pteridological Society. (the Society, 1988)

Bulletin - British Pteridological Society. (the Society, 1989)

Bulletin - British Pteridological Society. (the Society, 1990)

Bulletin - British Pteridological Society. (the Society, 1991)

Bulletin - British Pteridological Society. (the Society, 1992)

Bulletin - British Pteridological Society. (the Society, 1993)

Bulletin - British Pteridological Society. (the Society, 1994)

Bulletin - British Pteridological Society. (the Society, 1995)

Bulletin - British Pteridological Society. (the Society, 1996)

Bulletin - British Pteridological Society. (the Society, 1997)

Bulletin - British Pteridological Society. (the Society, 1998)

Bulletin - British Pteridological Society. (the Society, 1999)