Digital Filters: Principles and Applications Author: C. Paul Taylor ISBN (1st ed): 978-0133034691
The original papers included line drawings of deformed projectiles. In a low-quality PDF, these become jagged, pixelated messes. In a high-quality PDF, the figures remain sharp because they were scanned at 300 DPI or higher.
C.P. Taylor ’s play is a seminal work that explores how a "good" man—specifically a liberal-minded university professor named John Halder—slowly and rationally compromises his morals to join the Nazi party.