Balloon observation, and instructions on the subject of work in the basketUnited States. War Department. Division of Military Aeronautics

Balloon observation, and instructions on the subject of work in the basket

Name: Balloon observation, and instructions on the subject of work in the basket
Author: United States. War Department. Division of Military Aeronautics

United States. War Department. Division of Military Aeronautics · 2023

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ספרייה ציבורית, Project Gutenberg. בלי הרשמה.

BalloonsAerial observation (Military science)Military reconnaissanceAerial reconnaissance