Found the family in the 1900 census living in Santa Monica, Los Angeles Co., CA. John Crawford b: 11/1857 MO KY England Physician Lizzie F. Crawford b: 7/1860 MO Ky KY William O. Crawford b: 3/1885 MO MO MO O. Maughs Crawford b: 11/1888 CA MO MO
WWI Draft Registration Card O. Maughs Crawford b: 11/11/1888 in Los Angeles, CA 1115 A. Fairoaks Pasadena, CA
Self Employed as a Druggist address listed: 1526 Mission, So. Pasadena, CA
Oliver Maughs Crawford b: 11/11/1888 CA d: 6/23/1979 CA
In 1930 on Bronson Ave. in Los Angeles, CA there is: Oliver M. Crawford 43 Clerk in Drug Store Ray Crawford 43 Margaret Crawford 12 Jane M. Crawford 2
In 1920 in Watts, Los Angeles Co., CA William O. Crawford 34 MO MO MO Grace Crawford 34 OH England Maxen Crawford 6 1913 Loren Crawford 4 1915 Norman Crawford 2 1917
Maiden name for Grace is James.
I hope this will assist you in your search.Good Luck!