The U.S. government attempts to evaluate scientific evidence in the course of policy discussions in Congress and within the various executive agencies. Some of these are listed in BearCat, but others must be identified using the index to government publications called Marcive . Encyclopedia of the Environment. Macmillan Encyclopedia of Physics. Statistics and essays.
Many subject headings allow for geographic sub-headings.
Your success depends on how well you identify the best subject headings in the online catalog and in the indexes you are using. Use your imagination, and ask at the Information Desk for help. For subject searching, use both Subject Keyword and Subject Heading modes. The latter may provide cross references to other useful subject terms. Searching using key terms in Title field may turn up items that were missed when searching in the standard subject searching modes.