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- [39] HYDRAULIC FLUID MAINTENANCE PROGRAM HELPS CUT COSTS WOOD & WOOD PRODUCTS, 1983, 88 (06): : 96 - &
- [40] CUT MAINTENANCE COSTS IN REFINERIES BY PUNCHED CARD REPORTING ERDOL UND KOHLE ERDGAS PETROCHEMIE, 1965, 18 (03): : 207 - &