Understanding Society User Support

Hi User Support Team,
The source for ukwelc and ukahead is "the Socio-cultural Integration of Polish Migrants study" (see https://www.understandingsociety.ac.uk/documentation/mainstage/questionnaire-modules/attitudestotheuk_w7/#attitudestotheuk_w7.ukwelc). I tried to find that study so that I could include a suitable citation in my methods section, but I was not been able to find any information about it. However, I did find another study with similar questions and a similar name: "Socio-Cultural Integration Processes among New Immigrants in Europe" (SCIP), which ISER was involved with.
Please could you confirm whether that is the same study? If it is not, please could you let me know where I can find more information about the "the Socio-cultural Integration of Polish Migrants study"?
Also if there is somewhere else apart from the questionnaire module pages that provides information about where Understanding Society sourced their questions from, please could you let me know.
Many thanks, Benedict Hignell