פריטים דומים: the structure of discovery. Scientific discovery is no less logical than deduction/
- Discoveries and adventures in Central America /
- Language and the discovery of reality: a developmental psychology of cognition /
- Man's discovery of his past : a sourcebook of original articles /
- Certain systematic methods of scientific thinking may produce much more rapid progress than others/
- The structure of human populations /
- Sefl- Awareness and scientific method/