Military education. Army extension courses: subcourse, Map and aerial photograph reading, pt. 2, Aerial phograph reading, 1933-34, introduction and lesson 1-4.
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Military education. Army extension courses: subcourse, Map and aerial photograph reading, pt. 2, Aerial phograph reading, 1933-34, introduction and lesson 1-4.
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Military education. Army extension courses: subcourse, Map and aerial photograph reading, pt. 2, Aerial phograph reading, 1933-34, introduction and lesson 1-4.