Published in Discovery Reports Cambridge, in 1932, in volume 4, pages 233-264

Published in Discovery Reports Cambridge, in 1932, in volume 4, pages 265-292

Published in Discovery Reports, in 1932, in volume 5, pages 1-326

Published in Discovery Reports, in 1932, in volume 6, pages 1-138

Published in Discovery Reports, in 1932, in volume 6, pages 237-392

Published in Discovery reports, in 1932, in volume 6, pages 393-418