Notes:
Data source is "The Mumma Family of Cumberland, Pennsylvania" book by Samuel Hertzler Mumma 1962
1920 Census, PA, Cumberland Co., Mechanicsburg, ED 23, dwelling 162
Mumma, David S., head, owns, 26, b: PA/PA/PA, electrician bath steel company
" , Miriam S., wife, 28, b: PA/PA/PA
" , Martha J., dau, 2, b: PA/PA/PA
Howard, Luther G., father-in-law, 67, widowed, b: PA/PA/PA
1930 Census, PA, Cumberland Co., Lemoyne Borough, dwelling 309, 414 Sherman Avenue
Mumma, David S., head, owns $3000, 35, 1st m: @ age 25, b: PA/PA/PA, electrician steel company
" , Miriam, wife, 38, 1st m: @ age 28, b: PA/PA/PA
" , Martha, dau, 12, b: PA/PA/PA
" , David Jr., son, 2 5/12, b: PA/PA/PA
" , Robert, son, 1, b: PA/PA/PA
Working in Philadelphia when he died, but the family was living in Lemoyne, PA