Dr Fritz Kahn, The life of man - Das Leben des Menschen III, Stuttgart 1927. Dr. Fritz Kahn (1888–1968) was a Berlin based gynaecologist and popular science writer who visualized the structure and function of the human body in a very unique way.
Memory Retention and the Forgetting Curve (from Online Colleges). This is all accurate except the part about flashbulb memories--studies find that our "flashbulb memories" aren't any more accurate than our ordinary memories, just more vivid. Keep these tips in mind while studying!