MISSISSAUGA, Ont. - Denny Doherty, one-quarter of the 1960s folk-rock group the Mamas and the Papas, known for their soaring harmony on hits like "California Dreamin'" and "Monday, Monday," died Friday at 66. His sister Frances Arnold said the singer-songwriter died at his home in Mississauga, a city just west of Toronto, after a short illness. The group burst on the national scene in 1966 with the top 10 smash "California Dreamin'." The Mamas and the Papas broke new ground by having women and men in one group at a time when most singing groups were unisex. John Phillips, the...