
Mayr (1981) as cited in: C. Gnoli (2011) "Ontological foundations in knowledge organization: the theory of integrative levels applied in citation order". Scire actas. 17-1
Source: Principles of industrial organization, 1913, p. 42
Mayr (1981) as cited in: C. Gnoli (2011) "Ontological foundations in knowledge organization: the theory of integrative levels applied in citation order". Scire actas. 17-1
1980s and later, Interview in Silver & Gold Report (1980)
Time and Individuality (1940)
Conditions of Liberty (1994)