The book, Elementary Aircraft Identification: A Manual of Instruction For Air Observers, was produced during World War II for use by The American Legion, The Rhode Island State Council Of Defense and many United States Army and Navy training schools.  While this book was published primarily for the use of the aircraft spotters in the Civilian Aircraft Warning Service it was also used by other state and federal agencies including a number of military organizations throughout the war.  The many sections included in this paperback book are as follows: 1) Foreword; 2) Introduction; 3) Duties of an Observer; 4) Fundamentals; 5) Insignia of the Nations; 6) Types of Ships; 7) Bombing action; 8) Sound; 9) Nomenclature; 10) W-E-F-T-U-R-N System; 11) Wings (B-24, P-38, P-39, P-40, O-47, F2A2, P-36, P.B.M., F4U1; 12) Wing Planes; 13) Wing Tips; 14) Engines (Ju-52, DO-215, Ju-88); 15) Tail Planes (ME-109-E, P-38); 16) Fuselage (P-36, P-39, B-17, C-38, P-40, A20A, O-47, AT1, C-40, Halifax); 17) Landing Gear (SOC, SO3C); 18) Rudders (ME-109-E, HE-113, Whitley IV; 19) Nose; 20) Review; 21) Positions in Flight; 22) Summary; 23) U.S. Army Pursuits ( P-40E, P-39C, P-47, P-51); 24) U.S. Army Bombers (B-25, B-26A, B-24, B-17 C & D); 25) U.S. Army Attack Bombers (A-20-A, A-24); 26) U.S. Army Observation Planes ( O-46A, O-47, O-49, O-51, O-52); 27) Transport Planes (AT-7, C-39, C-40 A, C-45, C-46); 28) Trainers (PT-17, BT-13, AT-6-A, AT-10); 29) U.S. Navy (SBC-4 Hell Diver); 30) U.S. Navy Fighters (F2A-2, F4F-3, F4U-1); 31) U.S. Navy Bombers (SBD, SB2U, SB2U, SB2A, SB2C); 32) U.S. Navy Patrol Bombers (PBY-5, PBM-1, PB2Y-2); 33) U.S. Navy Planes (OS2U, SO3C-1, SO3C, SO3C-1); 34) U.S. Navy Torpedo Bombers (TBD, TBF); 35) U.S. Navy Torpedo Plane Action; 36) Questions; 37) Flash Tests; 38) Elementary Test; 39) Key to Flash Tests; 40) Advanced Identification; 41) Pursuits of 4 Nations, (Hurricane, ME-109E, Zero, P-40-E); 42) Bombers of 4 Nations, (Soyokaze, DO-215, Blenheim, B-25); 43) Heavy Bombers of 4 Nations, (Halifax, Kurrier, Nakajama-19, B-17-E); 44) British Planes; 45) British Pursuits, (Spitfire, Whirlwind, Defiant); 46) British Medium Bombers, (Beaufort, Hampton, Whitley, Wellington); 47) German Planes; 48) German Pursuits, (HE-113, FW-187, ME-110, FW-190); 49) German Medium Bombers, (JU-88-A, JU-87-B, HE-11-K, Messerschmitt Jaguar); 50) German Medium Bombers, (DO-26, Heinkel 177, B&V 142, JU-25-3M); 51) Japanese Planes; 52) Japanese Pursuits (Karigane N2, Nagoya OO, Zero); 53) Japanese Planes, (Showasho-98, Naka-97, Mitsu-96, Bakugekiki-99); 54) Russian Planes; 55) Russian Planes, (Charto, Rata, Mosca 116, SKB-26); 56) Italian Planes; 57) Italian Planes, (Caproni Reggione, Macchi C-200, Savoia Marchetti 8-2, Breda 65) Conquest of the Air, (Historical Planes); 66) American Plane Markings and 67) Advance Test.  In addition to an informative narrative, this book includes approximately 132 3-D airplane silhouettes and About 222 black and white illustrations.  This book is 96 pages and is in very good condition.  The author is Frederick R. Hazard, Director of Observation Posts & Chairman Aeronautics Committe of R.I..  Edition published in July 1942.