Shell Research 1946 Ad $9.00 Shell Research 1946 Ad $9.00 Shell Industrial Lubricants 1946 Ad $9.00 Shell Research 1947 Ad $9.00 Shell Research 1947 Ad $9.00 Shell Research 1947 Ad $9.00 Shell Research 1947 Ad $9.00 Shell Research 1947 Ad $9.00 Shell Research 1947 Ad $9.00 Shell Research 1949 Ad $9.00 Shell Research 1948 Ad $9.00 Shell Research 1948 Ad $9.00 Shell Research 1948 Ad $9.00 Shell Research 1948 Ad. $9.00 Shell Research 1948 Ad $9.00 Shell Research 1948 Ad $9.00 Shell Research 1948 Ad $9.00 Shell Research 1948 Ad $9.00 Shell Research November 20, 1948 ad states Pure Alcohol from Petroleum $9.00 Shell Research November 20, 1948 ad states Pure Alcohol from Petroleum $9.00