Clearing out revisited

Last(?) throwing-away-of-documents that I don’t need anymore(?)
Found a note saying this, but I don’t know who wrote it:

“given that air parcels move in a direction to carry spores on a course between a source and a susceptible crop (Davis; Davis and Draxler, 1997), the major factors affecting the chance of pathogen transmission are:
1. spore production at the source;
2. dilution of the spore cloud; and
3. mortality of spores during transport.”

Good-bye citation, I liked you!