Fallout: New Vegas skill magazines

General information
Skill magazines temporarily raise the corresponding skill by ten points (twenty with Comprehension), but wear off after a minute (three with Retention). There are a total of 213 skill magazines placed in permanent locations; however, certain merchants sell them, providing a limitless source. Also, the magazine vending machines on The Strip provide you with random magazines from time to time. Similar to chems, the effects of skill magazines do not stack; using two copies of Meeting People will only provide the bonus of one copy, wasting the second one.
 * With the perk Voracious Reader you can copy Skill magazines already in your inventory at a workbench.

Random locations
These magazines can be found in containers such as mailboxes and the 12 red magazine boxes on the Strip. Some of these containers will be replenished over time.