BYRDS GREATEST HITSFormed in Los Angeles in 1964, the Byrds hit with their first single, a vibrant take on Bob Dylan's "Mr. Tambourine Man," in 1965, introducing the term "folk rock" into the pop vocabulary. With a sound marked by soaring, multi part harmonies and 12 string Rickenbacker guitar, the Byrds racked up several more hits over the next two years, including a chart topping interpretation of Pete Seeger's "Turn, Turn, Turn." GREATEST HITS concentrates on the