http://www.gutenberg.org/ebooks/author/40177.opds 2024-11-08T15:41:15Z Books by Halsted, George Bruce (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://www.gutenberg.org webmaster@gutenberg.org https://www.gutenberg.org/gutenberg/favicon.ico 25 1 2024-11-08T15:41:15Z https://en.wikipedia.org/wiki/G._B._Halsted See also: en.wikipedia 2024-11-08T15:41:15Z https://sendtokindle.compellingsciencefiction.com/ebooks/39713.opds The Foundations of Science: Science and Hypothesis, The Value of Science, Science and Method Henri Poincaré