Who won the college football national championship in 1940-1949?

Record is shown as w-l-t

1940 Minnesota 8 0 0
1941 Minnesota 8 0 0
1942 Ohio State 9 1 0
1943 Notre Dame 9 1 0
1944 Army 9 0 0
1945 Army 9 0 0 
     Alabama  9 1 1
1946 Notre Dame 8 0 1
1947 Notre Dame 9 0 0
1948 Michigan 9 0 0
1949 Notre Dame 10 0 0