as_labelled_spss_survey
                        Labelled to labelled_spss_survey
collect_val_labels      Collect labels from metadata file
concatenate             Concatenate haven_labelled_spss vectors
create_codebook         Create a survey codebook
crosswalk_surveys       Crosswalk and harmonize surveys
document_survey_item    Document survey item harmonization
document_surveys        Document survey lists
harmonize_na_values     Harmonize na_values in haven_labelled_spss
harmonize_survey_values
                        Harmonize values in surveys
harmonize_survey_variables
                        Read a survey from a CSV file
harmonize_values        Harmonize the values and labels of labelled
                        vectors
harmonize_var_names     Harmonize the variable names of surveys
is.crosswalk_table      Validate a crosswalk table
is.survey_df            Create a survey object
label_normalize         Normalize value and variable labels
labelled_spss_survey    Labelled SPSS-style vectors with survey
                        provenance
labelled_spss_survey_coercion
                        Coercion methods for labelled survey vectors
merge_surveys           Merge surveys
metadata_create         Create a metadata table from several surveys
metadata_survey_create
                        Create a metadata table
na_range_to_values      Harmonize SPSS-style missing value ranges
pull_survey             Pull a survey from a survey list
read_csv                Read csv file
read_dta                Read Stata DTA files ('.dta') files
read_rds                Read rds file
read_spss               Read SPSS ('.sav', '.zsav', '.por') files.
                        Write '.sav' and '.zsav' files.
retroharmonize          retroharmonize: Retrospective harmonization of
                        survey data files
subset_surveys          Subset and optionally harmonize surveys
survey                  Create a survey data frame
