Science Fair Project Encyclopedia
139
| Years: 135 136 137 138 - 139 - 140 141 142 143 | |
| Decades: 100s 110s 120s - 130s - 140s 150s 160s | |
| Centuries: 1st century - 2nd century - 3rd century | |
Events
Births
Deaths
- Zhang Heng, Chinese mathematician
10-26-2009 08:16:03
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details


