Notes:
1930 census, PA, Dauphin Co., Londonderry Twp., ED 22-20, p. 135
Mumma, Michael, head, owner $1000, no radio, 65, m age 23, b. PA / PA / PA, occ: none
" , Fanny, wife, 65, m. age 23, b. PA / PA / PA
Mumma, Millard, head, renter $10, 41, m. age 20, b. PA / PA / PA, occ: machinest - electronic plant
" , Flora, wife, age?, m. age 24, b. PA / PA / PA
" , Enos, son, 18, single, b. PA
" , John, son, 16, single, b. PA
" , Paul, son, 9, single, b. PA
" , Ruth, dau, 8, single, b. PA