I liked the ones with dangerous animals on the covers. I have a 1968 edition (remember my dad had it when I was a kid, found a copy in good condition 2nd hand) featuring a ferocious Polar Bear in mid-rear.
Colt AR 15 was $194.50, listed right above the GyroJet rocket carbine at $300 (and $9 for six rounds)!!
Colt AR 15 was $194.50, listed right above the GyroJet rocket carbine at $300 (and $9 for six rounds)!!