Below is a link to an excellent info graphic you can pass on to your golfers who don't understand the specs when it comes to aeration.  Also there is a link to a good article on bunker maintenance that can be printed in PDF form.

 http://www.usga.org/course-care/infographics/infographic--the-ins-and-outs-of-aeration.html#expanded

http://www.usga.org/course-care/infographics/infographic--the-ins-and-outs-of-aeration.html#expanded