http://pec.lib.wvu.edu/record/P20221957-1966Interim report to shareholders for the six months ended ...Serial. Printed Ephemera Collection has: 1957:June 30, 1958:June 30-1966:June 30. Interim reports issued three times a year in March, June, and September. International Nickel Company of Canada.International Nickel Company of Canada--Periodicals.14256