* Stone WJ, Mink GI, Bergeson GB (1962) A new disease of American spearmint caused by tobacco ringspot virus. Plant Disease Reporter 46, 623-624.
------- As Mentha cardiaca.
* Berry RE (1998) Western yellowstriped armyworm. Spodoptera praefica. Insects and Mites or Economic Importance in the Northwest. Oregon State University Bookstore, p 221 (online modified version). http://uspest.org/potato/wystriparmyworm.pdf