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- [5] SECURING BENEFITS OF INTERNATIONAL CO-OPERATION IN ELECTRICITY SUPPLY ELECTRICAL REVIEW, 1970, 187 (13): : 436 - &
- [6] Co-Operation of Departments in English Instruction and Practice EDUCATION, 1915, 35 (07): : 409 - 421
- [8] CO-OPERATION FOR IMPROVEMENT IN ADMINISTRATIVE LAW AMERICAN BAR ASSOCIATION JOURNAL, 1974, 60 (DEC): : 1538 - 1540