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- [21] TAX CHANGES IN SINGAPORE - INCOME TAX(AMENDMENT)ACT, 1979 BULLETIN FOR INTERNATIONAL FISCAL DOCUMENTATION, 1979, 33 (11): : 491 - 497
- [23] TAX CHANGES IN ZAMBIA BUDGET FOR 1979 BULLETIN FOR INTERNATIONAL FISCAL DOCUMENTATION, 1979, 33 (05): : 227 - 229
- [25] DEVELOPMENTS IN WESTERN CANADA IN 1979. The American Association of Petroleum Geologists bulletin, 1980, 64 (09): : 1510 - 1517
- [26] DEVELOPMENTS IN NORTHERN ROCKIES IN 1979. The American Association of Petroleum Geologists bulletin, 1980, 64 (09): : 1501 - 1509
- [28] DEVELOPMENTS IN SOUTH TEXAS IN 1979. The American Association of Petroleum Geologists bulletin, 1980, 64 (09): : 1476 - 1483
- [30] DEVELOPMENTS IN OKLAHOMA AND PANHANDLE OF TEXAS IN 1979 AAPG BULLETIN-AMERICAN ASSOCIATION OF PETROLEUM GEOLOGISTS, 1980, 64 (09): : 1387 - 1392