Blue Book

[Elvis]

Blue Book of Airguns (http://books.google.com/books?vid=ISBN1886768560&id=iGJaBjU1ofAC&pg=PA18&lpg=PA18&ots=3O8kcU1Cj7&dq=airsoft&sig=1vlcLs5fBK-xbvAWU3Ghda2biHE#PPP1,M1)...
Robert D. Beeman, John B. Allen

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