| 1956 | 1956 Partnership Agreement | 1956-05-01 |
| 1957 | 1957 Partnership Letter | 1958-02 |
| 1958 | 1958 Partnership Letter | 1959-02-11 |
| 1959 | 1959 Partnership Letter | 1960-02-20 |
| 1960 | 1960 Partnership Letter | 1961-01-30 |
| 1961 | 1961 Partnership Letter (1) | 1961-07-22 |
| 1961 | 1961 Partnership Letter (2) | 1962-01-24 |
| 1962 | 1962 Partnership Letter (1) | 1962-07-06 |
| 1962 | 1962 Partnership Letter (2) | 1962-11-01 |
| 1962 | 1962 Partnership Letter (3) | 1963-01-18 |
| 1963 | 1963 Partnership Letter (1) | 1963-07-10 |
| 1963 | 1963 Partnership Letter (2) | 1963-11-06 |
| 1963 | 1963 Partnership Letter (3) | 1964-01-18 |
| 1964 | 1964 Partnership Letter (1) | 1964-07-08 |
| 1964 | 1964 Partnership Letter (2) | 1965-01-18 |
| 1965 | 1965 Partnership Letter (1) | 1965-07-09 |
| 1965 | 1965 Partnership Letter (2) | 1965-11-01 |
| 1965 | 1965 Partnership Letter (3) | 1966-01-20 |
| 1966 | 1966 Partnership Letter (1) | 1966-07-12 |
| 1966 | 1966 Partnership Letter (2) | 1966-11-01 |
| 1966 | 1966 Partnership Letter (3) | 1967-01-25 |
| 1967 | 1967 Partnership Letter (1) | 1967-07-12 |
| 1967 | 1967 Partnership Letter (2) | 1967-10-09 |
| 1967 | 1967 Partnership Letter (3) | 1967-11-01 |
| 1967 | 1967 Partnership Letter (4) | 1968-01-24 |
| 1968 | 1968 Partnership Letter (1) | 1968-07-11 |
| 1968 | 1968 Partnership Letter (2) | 1968-11-01 |
| 1968 | 1968 Partnership Letter (3) | 1969-01-22 |
| 1969 | 1969 Partnership Letter (1) | 1969-05-29 |
| 1969 | 1969 Partnership Letter (2) | 1969-10-09 |
| 1969 | 1969 Partnership Letter (3) | 1969-12-05 |
| 1969 | 1969 Partnership Letter (4) | 1969-12-26 |
| 1969 | 1969 Partnership Letter (5) | 1970-02-25 |