A service mark
Mark S. Cohen was born in 1956.
Mark S. Geston was born in 1946.
Mark S. George was born in 1958.
Mark S. Brewer died in 1901.
Mark S. Brewer was born in 1837.
Mark S. Doss was born in 1957.
Mark S. Homer was born in 1962.
Mark S. Olsen was born in 1962.
Mark S. Smith was born in 1956.
Mark S. Madsen has written: 'The dynamic cosmos' -- subject(s): Cosmology
Mark S. Pafford was born on 1966-04-11.
Mark S. McNaughton was born on 1963-05-07.