Sources

http://quickfacts.census.gov

http://www.sfnps.org/

http://www.los-angeles.us/topography.php

http://ggweather.com/sf/narrative.html

http://www.weatherbase.com/

http://www.sfpride.org/

http://www.sanfranciscochinatown.com/history

http://www.chinatownla.com/history.php

http://www.calleolvera.com/