| Maas, Herbert A.; 1952 Red Book; 1952 | 1952 Red Book | 1952-00-00 | LEETSDALE | Chief Engineer |
| Maas, Herbert A.; 1953 Red Book; 1953 | 1953 Red Book | 1953-00-00 | CAMBRIA | Chief Engineer |
| Maas, Herbert A.; 1954 Red Book; 1954 | 1954 Red Book | 1954-00-00 | CAMBRIA | Chief Engineer |
| Maas, Herbert A.; 1955 Red Book; 1955 | 1955 Red Book | 1955-00-00 | LEONARD C. HANNA | Chief Engineer |
| Maas, Herbert A.; 1956 Red Book; 1956 | 1956 Red Book | 1956-00-00 | LACKAWANNA | Chief Engineer |
| Maas, Herbert A.; 1957 Red Book; 1957 | 1957 Red Book | 1957-00-00 | DANIEL J. MORRELL | Chief Engineer |
| Maas, Herbert A.; 1958 Red Book; 1958 | 1958 Red Book | 1958-00-00 | DANIEL J. MORRELL | Chief Engineer |
| Maas, Herbert A.; 1959 Red Book; 1959 | 1959 Red Book | 1959-00-00 | JOHNSTOWN | Chief Engineer |
| Maas, Herbert A.; 1960 Red Book; 1960 | 1960 Red Book | 1960-00-00 | JOHNSTOWN | Chief Engineer |
| Maas, Herbert A.; 1963 Red Book; 1963 | 1963 Red Book | 1963-00-00 | JOHNSTOWN | Chief Engineer |
| Maas, Herbert A.; 1964 Red Book; 1964 | 1964 Red Book | 1964-00-00 | JOHNSTOWN | Chief Engineer |
| Maas, Herbert A.; 1965 Red Book; 1965 | 1965 Red Book | 1965-00-00 | JOHNSTOWN | Chief Engineer |
| Maas, Herbert A.; 1966 Red Book; 1965 | 1966 Red Book | 1965-00-00 | JOHNSTOWN | Chief Engineer |
| Maas, Herbert A.; 1967 Red Book; 1967 | 1967 Red Book | 1967-00-00 | JOHNSTOWN | Chief Engineer |
| Maas, Herbert A.; 1968 Red Book; 1968 | 1968 Red Book | 1968-00-00 | JOHNSTOWN | Chief Engineer |
| Maas, Herbert A.; 1969 Red Book; 1969 | 1969 Red Book | 1969-00-00 | JOHNSTOWN | Chief Engineer |
| Maas, Herbert A.; Great Lake Review 3/43; 1943 | Great Lake Review 3/43 | 1943-00-00 | WILLIAM H. DONNER | First Assistant |
| Maas, Herbert A.; Great Lakes News 4/40; 1940 | Great Lakes News 4/40 | 1940-00-00 | WILLIAM H. DONNER | Second Assistant |
| Maas, Herbert A.; Great Lakes News 5/43; 1943 | Great Lakes News 5/43 | 1943-00-00 | WILLIAM H. DONNER | First Assistant |
| Maas, Herbert A.; Great Lakes Review, 5/46; 1946 | Great Lakes Review, 5/46 | 1946-00-00 | LEBANON | First Assistant |
| Maas, Herbert A.; pc R. Plumb | pc R. Plumb | | JOHNSTOWN | Chief Engineer |