found: His Drumming at the edge of magic, c1990:CIP t.p. (Mickey Hart) pub. info. (lives in Petaluma, CA; drummer with the Grateful Dead)
found: All music guide, 3rd ed.:p. 826 (Mickey Hart; b. Sept. 11, 1943; drummer, ethnomusicologist, author)
found: Wikipedia, Feb. 13, 2019(Mickey Hart (born Michael Steven Hartman, September 11, 1943, Brooklyn); American percussionist and musicologist; best known as one of the two drummers of the rock band Grateful Dead; genres: rock, world music; years active: 1960s-present)