Army extension courses. Special text : Cavalry marches and camps / prep. under the dir. of the Chief of Cavalry for use with the Extension … Army extension courses. Special text : Signal depot organisation and administration / prep. under the dir. of the Chief Signal Officer for use with the … Army extension courses. Special text : Training management / prep. under the dir. of the Chief of Infantry for use with the Extension Course of … Army extension courses. Special text : Combat orders, Air Corps / prep. under the dir. of the Chief of the Air Corps for use with … Army extension courses. Special text : Meteorology / prep. under the dir. of the Chief of the Air Corps for use with the Extension Course … Army extension courses. Special text : Meteorology / prep. under the dir. of the Chief of the Air Corps for use with the Extension Course … Army extension courses. Special text : Organization and operation of the Adjutant General's Department / prep. under the dir. of the Adjutant General for use … Army extension courses. Special text : Duties of a Division Adjutant General during mobilization and during demobilization of the division / prep. under the dir. … Army extension courses. Special text : Organization of the army / prep. under the dir. of the War Department for use with the Army Extension … Army extension courses. Special text : Organization of the army / prep. under the dir. of the War Department for use with the Army Extension … Army extension courses. Special text : Supply / prep. under the dir. of the Quartermaster General for use with the Army Extension Courses Army extension courses. Special text : Supply / prep. under the dir. of the Quartermaster General for use with the Army Extension Courses