The first writing system of the sumerians
- The first writing system of the sumerians is known as
- It is the first formed writing system of the sumerians
- The first writing system the sumerians invented was made of pictograms
- The development of the first writing system contributed by the sumerians
- The sumerians developed the first system of writing known as
- The sumerians developed the world's first system of writing called
- The sumerians invented the first known system of writing called
- The ancient sumerians invented the first system of writing called
- The sumerians developed the world's first system of writing