Published in American Fern Journal, in 1931, in volume 21, pages 1-10

Published in American Fern Journal, in 1931, in volume 21, pages 11-20

Published in American Fern Journal, in 1931, in volume 21, pages 21-24

Published in American Fern Journal, in 1931, in volume 21, pages 24-25

Published in American Fern Journal, in 1931, in volume 21, pages 25-26

Published in American Fern Journal, in 1931, in volume 21, pages 26-27

Published in American Fern Journal, in 1931, in volume 21, pages 27-29

Published in American Fern Journal, in 1931, in volume 21, pages 49-57

Published in American Fern Journal, in 1931, in volume 21, pages 57-63

Published in American Fern Journal, in 1931, in volume 21, pages 64-71

Published in American Fern Journal, in 1931, in volume 21, pages 71-73

Published in American Fern Journal, in 1931, in volume 21, pages 74-75

Published in American Fern Journal, in 1931, in volume 21, pages 75-76

Published in American Fern Journal, in 1931, in volume 21, pages 81-90

Published in American Fern Journal, in 1931, in volume 21, pages 90-102

Published in American Fern Journal, in 1931, in volume 21, pages 103-106

Published in American Fern Journal, in 1931, in volume 21, pages 106-109

Published in American Fern Journal, in 1931, in volume 21, pages 109-111

Published in American Fern Journal, in 1931, in volume 21, pages 111

Published in American Fern Journal, in 1931, in volume 21, pages 117-124

Published in American Fern Journal, in 1931, in volume 21, pages 125-132

Published in American Fern Journal, in 1931, in volume 21, pages 132-136

Published in American Fern Journal, in 1931, in volume 21, pages 136-139

Published in American Fern Journal, in 1931, in volume 21, pages 139-140

Published in American Fern Journal, in 1931, in volume 21, pages 140-143