Published in Philippine Journal of Science D, in 1915, in volume 9, pages 405-407

Created: 2013-11-17, modified: 2013-11-17

Published in Philippine Journal of Science D, in 1915, in volume 9, pages 457-464

Created: 2016-08-22, modified: 2016-08-22

Published in Philippine Journal of Science, in 1915, in volume 9, issue D, pages 531-533

Created: 2015-04-22, modified: 2015-04-22

Published in Philippine Journal of Science, in 1915, in volume 10, pages 49-58

Created: 2017-10-11, modified: 2017-10-11

Published in Philippine Journal of Science D, in 1915, in volume 10, pages 75-88

Created: 2014-11-23, modified: 2014-11-23

Published in Philippine Journal of Science D, in 1915, in volume 10, pages 365-405

Created: 2015-02-02, modified: 2015-02-02

Published in Philippine Journal of Science Manila Sect D, in 1915, in volume 10, issue 2, pages 89-109

Created: 2013-08-16, modified: 2013-08-16

Published in The Philippine journal of science, in 1915, in volume 10, issue 6, pages 317-343

Created: 2016-02-09, modified: 2016-02-09