http://book.klll.cc/ebooks/subject/40012.opds 2025-11-18T00:09:30Z Books about Atomic structure Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-18T00:09:30Z https://book.klll.cc/ebooks/73087.opds On the quantum theory of radiation and the structure of the atom Niels Bohr