Biblioteca del Congreso de los EEUU http://id.loc.gov/authorities/names/n84036019
Biblioteca Nacional Francesa http://data.bnf.fr/12032423
Biblioteca Nacional Alemana http://d-nb.info/gnd/172250668
Biblioteca Nacional Alemana http://d-nb.info/gnd/123616875
Sudoc http://www.idref.fr/028500695
ISNI http://isni-url.oclc.nl/isni/0000000066384087
VIAF http://viaf.org/viaf/94838178
Fuente consultada Max Weber's "Science as a vocation", 1989
Información encontrada (edited by Peter Lassman and Irving Velody, With Herminio Martins)