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Journal Article Social Support Networks Get access Helen Land Helen Land School of Social Work, University of Southern California, Los Angeles Search for other works by this author on: Oxford Academic PubMed Google Scholar Social Work, Volume 31, Issue 1, January-February 1986, Page 72, https://doi.org/10.1093/sw/31.1.72 Published: 01 January 1986
Helen Land (1986) studied this question.