sas programming II:manipulating data with the data step

thanks a lot

thank you so much! all the book you put on the web are so useful!you are so kindhearted!<br>

Thanks

多谢, free 的东西一定要顶.[em01]

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it's free,thanks

Thanks

谢谢！

很有帮助的一本书啊

A very good one. Thanks for sharing. Looking forward to III.<br>