/opt/openlibrary/deploys/openlibrary/308a127/openlibrary/templates/lists/widget.html: error in processing template: AttributeError: 'NoneType' object has no attribute 'get_default_cover' (falling back to default template)
This is a chart to show the publishing history of editions of works about this subject. Along the X axis is time, and on the y axis is the count of editions published. Click here to skip the chart.Reset chart or continue zooming in. This graph charts editions published on this subject.
