In Freeside, go to the Old Mormon Fort. Seek out Julie Farkes inside the Fort. Choose the dialogue option to help them get medical supplies. Click through the dialogue options to hear one that tells you that she just got a shipment of magazines. After all this you will need to choose the option "I have some medical supplies to drop off." There are three options; choose the Rad-Away as this is the easiest one of the three to find. You only need to leave one thing if you don't care about fame. Every time you give them something you will gain more fame. After you give them the supplies choose the option "I'd like to buy medical supplies." There are a few aid supplies here that you can get if you want although they will not regenerate. In the supply list you can find the Magazines. Buy up what you want and then exit. After that, choose the option to give med supplies again. This time you need not give them anything just choose the "Never mind" option. Go back to "Buy medical supplies" and you can repeat teh process for more magazines. You can do it infinitely as long as you choose to drop off supplies first. You can even come back to at a later time. Here are the magazines you can score: