# A methodological investigation of non sampling error: Interviewer variability and non response

> doctoral thesis by Richard D Wiggins

**Wikidata**: [Q105761861](https://www.wikidata.org/wiki/Q105761861)  
**Source**: https://4ort.xyz/entity/a-methodological-investigation-of-non-sampling-error-interviewer-variability-and-non-response


## References

1. [Source](https://researchonline.lse.ac.uk/id/eprint/132287/)