![A female employee prepares punch cards for the 1920 census using a punch card machine](../sites/default/files/styles/full_width_image_700x400max/public/1920_keypunch_clerk.jpg%3Fitok=69rM1IMz)
A female employee prepares punch cards for the 1920 census using a punch card machine
![A female employee prepares punch cards for the 1920 census using a punch card machine](../sites/default/files/styles/full_width_image_700x400max/public/1920_keypunch_clerk.jpg%3Fitok=69rM1IMz)
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