Proportion of books per author where book publisher is Manel Ortega

This pie chart displays books per author using the aggregation count. The data is from the books entity and is filtered where the book publisher is Manel Ortega.此饼图展示了按作者统计的书籍数量，数据源自书籍实体，并经过筛选，仅包括由Manel Ortega出版社出版的书籍。