Annual Report to Shareholders - Air Reduction
| Field | Value |
|---|---|
| Alabama | 1921-1970 |
| Columbia | 1920-1953 |
| Harvard | 1932-49. |
| Purdue | 1920-1936, 1929-1963. |
| MIT | 1931, 1932, 1933, 1934, 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1944, 1945, 1947, 1948, 1949, 1950, 1951, 1952, |
| NYPL | 1920 - 1956 |