Posted on 04/05/202404/05/2024 by userElementary Number Theory in 9 Chapters, 2nd Ed. https://www.dropbox.com/scl/fi/zqfdmjlojbo33awuwz0a3/Elementary-Number-Theory-in-Nine-Chapters-2nd-ed.-J.-Tattersall-Cambridge-2005.pdf?rlkey=zml82a1xa5mz8e4kdbd141x8i&dl=0