Surprising markings in used Apollo book

I have now obtained my own copy of *Manned Spacecraft Operation*, a recipe
book for building Apollo, and found some interesting markings inside it.
See http://beamjockey.livejournal.com/86918.html.

--
Bill Higgins | "I continue to feel that
Fermilab | if you're going to go on being this stupid,
Internet: | you should try to be more polite; or alternately,
| if you're going to go on being this rude,
| you should try not to say such dumb things."
| --Teresa Nielsen Hayden