# Quantum theory

Free to read here, from Project Gutenberg.

5 titles; page 1 of 1.

- [The Theory of Spectra and Atomic Constitution: Three Essays](https://invisiblenetwork.ai/books/gutenberg/47464) by Niels Bohr
- [The Origin and Development of the Quantum Theory](https://invisiblenetwork.ai/books/gutenberg/33663) by Max Planck
- [The quantum postulate and the recent development of atomic theory](https://invisiblenetwork.ai/books/gutenberg/72800) by Niels Bohr
- [On the quantum theory of radiation and the structure of the atom](https://invisiblenetwork.ai/books/gutenberg/73087) by Niels Bohr
- [On the Quantum Theory of Line-Spectra, Part 1 and 2](https://invisiblenetwork.ai/books/gutenberg/47167) by Niels Bohr