Key points are not available for this paper at this time.
Journal Article PERSONAL CORRESPONDENCE Get access S.F. ACTORY, S.F. ACTORY DR. Search for other works by this author on: Oxford Academic PubMed Google Scholar D. QUORKS D. QUORKS DR. Search for other works by this author on: Oxford Academic PubMed Google Scholar Occupational Medicine, Volume 9, Issue 4, January 1960, Pages 151–152, https://doi.org/10.1093/occmed/9.4.151 Published: 01 January 1960
Actory et al. (Fri,) studied this question.