Agricultural aircraft are also used for hydroseeding.
==Zunanje povezave==*(1940) AN 01-40AL-2 A-20 Boston Erection and Maintenance Manual*AeroWeb: "List of survivor A-20s on display"*Warbird Registry: List of A-20 Havocs that survived military service*Aircraft Photos: "Bill Pippin's Douglas P-70 "39-736""*A-20 Havoc History, images, and specs from the reference book "American Combat Planes of the 20th Century" by Ray Wagner*Training video World War II training video on pre-flight check, takeoff, flight characteristics, and landing of the A-20*"Porcupine Squadron", "Popular Science," May 1942 article on the A-20* log of 416th squadron- indicates crew of plane on fire on this website