Books about airguns

Robert Beeman, John B. Allen: Blue Book of Airguns, Blue Book Publications, 2010, ISBN 978-1-936120-03-1.

G.V. Cardew, Gerard Michael Cardew: The Air Gun From Trigger To Target, Sep 1995, ISBN 978-0-950510-82-8

Matthew Manning: Hunting with Air Rifles: The Complete Guide, Apr 2017, ISBN 978-0-857161-64-2 d

Tom Holzel: The air rifle hunter's guide, Jan 1994 b

W.H.B Smith: Smith's Standard Encyclopedia of Gas, Air, & Spring Guns of the World, 1957 c