(Q47513158)
Statements
20. century
1929
1930
1 reference
28 March 2019
Lillian Moller Gilbreth (English)
1 reference
16 April 2019
1 reference
29 January 2018
1 reference
29 January 2018
1 reference
29 January 2018
1 reference
29 January 2018
NPG.97.59
1 reference
29 January 2018
Identifiers
1 reference