| Gregg, Harry G. | | | ORION | Captain |
| Gregg, Harry G. | | | PLEIADES | Captain |
| Gregg, Harry G. | | | MERCURY | Captain |
| Gregg, Harry G. | | | POLARIS | Captain |
| Gregg, Harry G.; 1949 Red Book; 1949 | 1949 Red Book | 1949-00-00 | ORION | Captain |
| Gregg, Harry G.; 1950 Red Book; 1950 | 1950 Red Book | 1950-00-00 | ORION | Captain |
| Gregg, Harry G.; 1951 Red Book; 1951 | 1951 Red Book | 1951-00-00 | ORION | Captain |
| Gregg, Harry G.; 1952 Red Book; 1952 | 1952 Red Book | 1952-00-00 | ORION | Captain |
| Gregg, Harry G.; 1953 Red Book; 1953 | 1953 Red Book | 1953-00-00 | ORION | Captain |
| Gregg, Harry G.; 1954 Red Book; 1954 | 1954 Red Book | 1954-00-00 | ORION | Captain |
| Gregg, Harry G.; 1955 Red Book; 1955 | 1955 Red Book | 1955-00-00 | ORION | Captain |
| Gregg, Harry G.; 1956 Red Book; 1956 | 1956 Red Book | 1956-00-00 | ROCKET | Captain |
| Gregg, Harry G.; 1957 Red Book; 1957 | 1957 Red Book | 1957-00-00 | PLEIADES | Captain |
| Gregg, Harry G.; 1958 Red Book; 1958 | 1958 Red Book | 1958-00-00 | PLEIADES | Captain |
| Gregg, Harry G.; 1959 Red Book; 1959 | 1959 Red Book | 1959-00-00 | PLEIADES | Captain |
| Gregg, Harry G.; 1960 Red Book; 1960 | 1960 Red Book | 1960-00-00 | MERCURY | Captain |
| Gregg, Harry G.; 1961 Red Book; 1961 | 1961 Red Book | 1961-00-00 | POLARIS | Captain |
| Gregg, Harry G.; 1962 Red Book; 1962 | 1962 Red Book | 1962-00-00 | POLARIS | Captain |
| Gregg, Harry G.; 1963 Red Book; 1963 | 1963 Red Book | 1963-00-00 | POLARIS | Captain |
| Gregg, Harry G.; 6/48 Great Lakes Review; 1948 | 6/48 Great Lakes Review | 1948-00-00 | COMET | First Mate |
| Gregg, Harry G.; Great Lakes News 1949 | Great Lakes News 1949 | 1949-00-00 | EDGEWATER | Captain |
| Gregg, Harry G.; Great Lakes News 3/47; 1947 | Great Lakes News 3/47 | 1947-00-00 | ROCKET | First Mate |
| Gregg, Harry G.; Great Lakes News 4/45; 1945 | Great Lakes News 4/45 | 1945-00-00 | ROCKET | First Mate |
| Gregg, Harry G.; Great Lakes News 5/46; 1946 | Great Lakes News 5/46 | 1946-00-00 | ROCKET | First Mate |
| Gregg, Harry G.; Great Lakes News 7/43; 1943 | Great Lakes News 7/43 | 1943-00-00 | NORTH STAR | Second Mate |
| Gregg, Harry G.; Great Lakes Review. 1944 | Great Lakes Review. 1944 | 1944-00-00 | NORTH STAR | First Mate |
| Gregg, Harry G.; LCA Bulletin 5/37; 1937 | LCA Bulletin 5/37 | 1937-00-00 | | Wheelsman |