Published in Transactions of The American Microscopical Society, in 1920, in volume 39, pages 231-242

Published in Transactions of The American Microscopical Society, in 1920, in volume 39, pages 142-148

Published in Transactions of The American Microscopical Society, in 1920, in volume 39, pages 95-141

Published in Transactions of The American Microscopical Society, in 1920, in volume 39, pages 149-162

Published in Transactions of The American Microscopical Society, in 1920, in volume 39, pages 51-85

Published in Transactions of The American Microscopical Society, in 1920, in volume 39, pages 199-229

Published in Transactions of The American Microscopical Society, in 1920, in volume 39, pages 163-166

Published in Transactions of The American Microscopical Society, in 1920, in volume 39, pages 86-88

Published in Transactions of The American Microscopical Society, in 1920, in volume 39, pages 25-50

Published in Transactions of The American Microscopical Society, in 1920, in volume 39, pages 167-198