- Cărți electroniceThe Immaterial Structure of Human ExperienceGeorge Lowell Tollefson
- Cărți electroniceSpirit as Universal ConsciousnessGeorge Lowell Tollefson
- Cărți electroniceThe System of the MindGeorge Lowell Tollefson
- Cărți electroniceUnbridled Democracy and other philosophical reflectionsGeorge Lowell Tollefson
- Cărți electroniceA Healer of NationsGeorge Lowell Tollefson
- Cărți electroniceThe Thinking ArtsGeorge Lowell Tollefson
- Cărți electroniceThoughts on Creativity, Spirit, and the Ethical LifeGeorge Lowell Tollefson
- Cărți electroniceThe Thinking ProcessGeorge Lowell Tollefson
- Cărți electroniceEthical ConsiderationsGeorge Lowell Tollefson
- Cărți electroniceMoral DemocracyGeorge Lowell Tollefson
- Cărți electroniceThe Limits of ReasonGeorge Lowell Tollefson
- Cărți electroniceKey to the Philosophy of ImmaterialismGeorge Lowell Tollefson