Scientific Information Activities Of Federal Agencies U.S. Dept. of Interior
I believe these go together.  , but part 1 is Dec 1961 & Part 2 is October 1962 

I will gladly combine shipping if possible, just ask before paying please.

If you would like more pictures clarifying something, please ask!

I will gladly offer a refund on the item if it is not as described.

Mag 3 - G
Attention overseas buyers
-- I will not alter the value or change the item to a gift.  
-- You may be responsible  for  an import duty.
-- If you want a tracking number, you need to upgrade to Express shipping.

If you have any problems or questions PLEASE send me a message through eBay immediately!