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 : Care and operation of motor vehicles / prep. under the dir. of the Chief of Infantry for use with … Linie-school Reglement op de exercitiën der infanterie : grondslag van het onderrigt en rekruten-school / uitgeg. op last van den Koning Reglement op de exercitiën der Infanterie : grondslagen van het onderricht en rekruten-school / uitg. op last van den Koning