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Molecular model for demonstration to the visually impaired

1900-1950

Molecular model for demonstration to the visually impaired

1900-1950

Molecular model for demonstration to the visually impaired

1900-1950

Molecular model for demonstration to the visually impaired

1900-1950
Set of four molecular models for demonstration to the visually impaired, 20th century.

Molecular models for demonstration to the visually impaired

1900-1950