Fred Sommers
Existence and correspondence-to-fact![Open Access Link](images/OAlink.png)
1996
in: Formal ontology, Dordrecht : Springer
![Open Access Link](images/OAlink.png)
The logical and the extra-logical![Open Access Link](images/OAlink.png)
1974
in: Methodological and historical essays in the natural and social sciences, Dordrecht : Springer
![Open Access Link](images/OAlink.png)
1996
in: Formal ontology, Dordrecht : Springer
1974
in: Methodological and historical essays in the natural and social sciences, Dordrecht : Springer