رِسَالَةُ فِي اَلْكَلاَمِ عَلَي اَلْحُرُوفِ

Licence: Public Domain Mark

Credit: رِسَالَةُ فِي اَلْكَلاَمِ عَلَي اَلْحُرُوفِ . Source: Wellcome Collection.