small scale gold refining by roland loewen 1980 project report 44/1

this is the project report 44/1 small scale gold refining by roland loewen for the worshipful company of goldsmiths in association with the jewellery institute of america i don't know how many were made but it wouldn't of been too many i don't think. It is original project report so could be quite rare. he went on to release hard back books in the 90s as far as i know. any info on this would be greatly received i brought it on eBay a few years ago its one of my prized possessions. only defect is binder is missing.