Proceedings of the National Academy of Sciences
The Proceedings of the National Academy of Sciences (usually simply referred to as PNAS) is a scientific journal established by the National Academy of Sciences in 1914.
Articles published in the journal are subjected to peer review. However, the sometimes short length of said review has recently sparked criticism from Conservapedia. PNAS has further been accused of ideological censorship, refusing to publish studies and other materials that challenge scientific orthodoxy. 
- See for example Flaws in Richard Lenski Study