[pstricks] draw the bell-shaped

[Vo Duc Hoang Vu]

Could you help me using pstricks to draw a bell-shaped curve with filling 
two tails as the picture below?

http://img221.imageshack.us/img221/3385/hamsoxacsuatfm3.jpg

Thank you.

Vu Vo


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Vietnam - Netherlands Programme for MA in Development Economics
<a href="http://www.vnp.edu.vn">http://www.vnp.edu.vn</a>
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