Open Daniel-Mietchen opened 6 years ago
e.g. NBK280240 for https://www.ncbi.nlm.nih.gov/books/NBK280240/
See also https://www.ncbi.nlm.nih.gov/books/about/openaccess/ and https://www.ncbi.nlm.nih.gov/books/about/ftp/
e.g. NBK280240 for https://www.ncbi.nlm.nih.gov/books/NBK280240/