http://book.klll.cc/ebooks/author/55877.opds?sort_order=title 2025-11-16T13:00:47Z Books by Holst, Helge Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-16T13:00:47Z https://sv.wikipedia.org/wiki/Helge_Holst See also: sv.wikipedia 2025-11-16T13:00:47Z https://book.klll.cc/ebooks/70708.opds atom and the Bohr theory of its structure : an elementary presentation Hendrik Anthony Kramers and Helge Holst