The vinegar gnats or pomace flies :
their relation to the canning of tomatoes /
by L.P. Ditman, Ernest N. Cory and A.R. Buddington.

APA Citation

Ditman, L. P. (Lewis Polster)., Cory, E. Neal., Buddington, A. R. (1936). The vinegar gnats or pomace flies: their relation to the canning of tomatoes. College Park: University of Maryland, Agricultural Experiment Station.

MLA Citation

Ditman, L. P. (Lewis Polster), 1903-, Ernest Neal Cory, and Arthur R. Buddington. The Vinegar Gnats Or Pomace Flies: Their Relation to the Canning of Tomatoes. College Park: University of Maryland, Agricultural Experiment Station, 1936.