sentences:  He began writing a monthly column about the jazz milleu for Jazz Journal, beginning in its first issue in 1948 until his death in 1999; while he often wrote for other publications, he only discussed his personal opinions in that column.He continued to run the family business (his main source of income), as well.During the 1950s he coined the term "mainstream" to describe those in between revivalist Dixieland and modern bebop, concentrating on black musicians.