survey package
http://r-survey.r-forge.r-project.org/survey/
https://www.stat.auckland.ac.nz/people/tlum005
http://faculty.washington.edu/tlumley/cv.html
Lumley, T. (2004). Analysis of Complex Survey Samples. Journal of Statistical Software, 9(1), 1–19. https://doi.org/10.18637/jss.v009.i08
{pdf=images/openfiles/complex_survey_article.pdf|100%|700|complex_survey_article.pdf}
Lumley, T. (2010). Complex Surveys: A Guide to Analysis Using R. John Wiley. https://www.wiley.com/en-us/Complex+Surveys%3A+A+Guide+to+Analysis+Using+R-p-9780470284308
http://r-survey.r-forge.r-project.org/svybook/
package
{pdf=http://cran.fhcrc.org/web/packages/survey/survey.pdf|100%|700|http://cran.fhcrc.org/web/packages/survey/survey.pdf}
The Comprehensive R Archive Network
https://faculty.washington.edu/tlumley/old-survey/survey-wss.pdf
https://campus.datacamp.com/courses/analyzing-survey-data-in-r