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The wonders of science
COM23A00_471

The wonders of science

The wonders of science
COM23A00_472

The wonders of science

The wonders of science
COM23A00_457

The wonders of science

The wonders of science
COM23A00_473

The wonders of science

German schoolgirls during a lesson about traffic safety
COM14A05_465

German schoolgirls during a lesson about traffic s...

Salvage apparatus for coal miners
COM10326_021

Salvage apparatus for coal miners