APA

Wolfenbarger, S., Massie, S., Ocamb, C., Eck, E., Grove, G., Nelson, M., Probst, C., Twomey, M., & Gent, D. (2016). Distribution and Characterization of Podosphaera macularis Virulent on Hop Cultivars Possessing R6-Based Resistance to Powdery Mildew. : American Phytopathological Society.