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ספרים בחינם

The Pneumatic Despatch Tube System of the Batcheller Pneumatic Tube Co. Also, Facts and General Information Relating to Pneumatic Despatch Tubes

Birney C. (Birney Clark) Batcheller · 2020

ספרייה ציבורית, Project Gutenberg. בלי הרשמה.

Pneumatic-tube transportation