US National Academies of Sciences
"The US National Academy of Sciences is a private, nonprofit, self-perpetuating society of distinguished scholars engaged in scientific and engineering research, dedicated to the furtherance of science and technology and to their use for the general welfare. (... It) has a mandate that requires it to advise the federal government on scientific and technical matters."
Home page of the National Academy of Sciences: www.nas.edu/
Home page of the National Academies: /www.nationalacademies.org/
Home page of the National Academy Press: http://lab.nap.edu/
Source: US National Academies of Sciences website