| Reference | {Deposit:: THE DOW CHEMICAL COMPANY, ANNUAL REPORT, 1950.}{Deposit:: FIFTY YEARS OF THE DOW CHEMICAL COMPANY, ITS PROGRESS AND ITS PEOPLE, 1947, THE DOW CHEMICAL COMPANY.}{Deposit:: DOW CHEMICAL WEB PAGE, HTTP://www.dow.com/facilities/namerica/michigan/index.htm}{Deposit:: PERSONAL CORRESPONDANCE WITH RAY VUGRINOVICH WITH THE GEOLOGICAL SURVEY DVISION, LANSING, MI.} |