Magnetic declination in Delaware, Maryland, Virginia, Kentucky and Tennessee / U.S. Department of Commerce, Coast and Geodetic Survey Aviation safety program / prepared by U.S. Naval Aviation Safety Center men-at-arms series Army of Northern Virginia / text by Philip R.N. Katcher ; colour plates by Michael Youens Tactics instruction memorandum : Tactical Aspects of Field Artillery Fire Direction Gunnery instruction memorandum : Short Base Flash Ranging for Marine Field Artillery Gunnery instruction memorandum : Construction and Use of a Rapid Computer for Survey Traverses Materiel instruction memorandum : Sighting and laying equipment for field artillery materiel Materiel instruction memorandum : The Firing Battery 155mm Howitzer M1 Tactics instruction memorandum : Radio voice procedure for field artillery Logarithmic trigonometric and short-base tables Gunnery instruction memorandum : Use of Photomaps in Field Artillery Battalion Survey and Unobserved Fire Gunnery instruction memorandum : Laying A Mosaic by Radial Line Method