Published in Philippine Journal of Science, in 1922, in volume 19, pages 439-515

Published in Philippine Journal of Science, in 1922, in volume 19, pages 517-521

Published in Philippine Journal of Science, in 1922, in volume 19, pages 523-627

Published in Philippine Journal of Science, in 1922, in volume 19, pages 665-676

Published in Philippine Journal of Science, in 1922, in volume 20, pages 519-542

Published in Philippine Journal of Science, in 1922, in volume 20, pages 543-597

Published in Philippine Journal of Science, in 1922, in volume 21, pages 57-85

Published in Philippine Journal of Science, in 1922, in volume 21, pages 161-206

Published in Philippine Journal of Science, in 1922, in volume 21, pages 257-303

Published in Philippine Journal of Science, in 1922, in volume 21, pages 373-384

Published in Philipp. Journal Sci, in 1922, in volume 21, pages 385-413

Published in Philippine journal of science, in 1922, in volume 21, pages 569-596