Best Primary Sources for Logical Positivism

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1

What would be the best primary sources for logical positivism?

I want to understand logical positivism as it came from the people who actually came up with it.

2

http://en.wikipedia.org/wiki/Language,_Truth,_and_Logic

3

Almost forgot:

http://www.amazon.com/Logical-Structure-Pseudoproblems-Philosophy-Classics/dp/0812695232/ref=reg_hu-rd_dp_img_T2#_

4

Oh yeah and an awsome AJ Ayer interview:

http://www.youtube.com/watch?v=DMlXmLbGKJY

good stuff

funny moment somewhere in there where the interviewer asked Ayer what was the biggest problem about positivism, to which Ayer replied “it was completely false”