Shade-tree and ornamental insects of British ColumbiaPublished in Proceedings of the Entomological Society of British Columbia, Victoria, in 1915, in volume 7, pages 35-41Aphid notes from British ColumbiaPublished in Proceedings of the Entomological Society of British Columbia, in 1915, in volume 5, pages 82-85
Aphid notes from British ColumbiaPublished in Proceedings of the Entomological Society of British Columbia, in 1915, in volume 5, pages 82-85