tuugas pertama mahasiswa

Matematika :

1. http://sryagustinapink.blogspot.com/2011/12/sistem-numerasi.html
2. http://agis-nelasari.blogspot.com/2011/12/sejarah-sistem-numerasi_2337.html
3. http://books.google.co.id/books?id=zw5DFCbBPBgC&pg=PA79&lpg=PA79&dq=sistem+numerasi&source=bl&ots=6K-ty136FV&sig=zZlvCwHn0CsmWoHbmj4XB_HfNas&hl=en#v=onepage&q=sistem%20numerasi&f=false
4. http://books.google.co.id/books?id=zw5DFCbBPBgC&pg=PA79&lpg=PA79&dq=sistem+numerasi&source=bl&ots=6K-ty136FV&sig=zZlvCwHn0CsmWoHbmj4XB_HfNas&hl=en#v=onepage&q=sistem%20numerasi&f=false