2 "Fișier:The_pendulum_(IA_pendulum1902cant_17).pdf".

Fișier:The pendulum (IA pendulum1902cant 17).pdf

not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:The_pendulum_(IA_pendulum1902cant_17).pdf...

Fișier:The pendulum (IA pendulum1902cant 9).pdf

should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:The_pendulum_(IA_pendulum1902cant_9).pdf...

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