The relation of the health of the host and other factors to infection of Apium graveoleus by Septoria appii
Thomas, H. Earl (Harvey Earl), 1890-1974.
text
New York,
1921.
eng
Celery--Diseases and pests.
Septoria.
Also available in digital form.
http://hdl.loc.gov/loc.gdc/scd0001.00028108564