Home › Authors › John H. Howell 👤 John H. Howell 2 books Books by John H. Howell Laboratory afficacy of 3-trifl Laboratory afficacy of 3-trifluoromethyl-4-nitrophenol (TFM) as a lampricide 1975 Synergism of 5, 2-́dichloro-4- Synergism of 5, 2-́dichloro-4-́nitro-salicylanilide and 3-trifluormethyl-4-nitrophenol in a selective lamprey larvicide 1964