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- [22] VARIABLE-SPEED DRIVES MAY CUT PIPELINE PUMPING COSTS. Oil and Gas Journal, 1980, 78 (33): : 84 - 85
- [23] NEW IDEA IN FOAM-CORE PANELS HELPS CUT BUILDING COSTS 20%. Modern Plastics, 1979, 56 (03): : 54 - 55
- [24] CAPITAL AND RUNNING COSTS OF AIR CONDITIONING AND SOLAR PROTECTION. Heating and Air Conditioning Journal, 1975, 44 (522): : 12 - 17
- [25] COMBINING SERVICES CAN CUT COSTS, SIX-CITY SANITATION STUDY INDICATES. Solid wastes management, refuse removal journal, 1980, 23 (13): : 78 - 98
- [26] PREDICTING DISPLACEMENT EFFICIENCY FROM WATER-CUT OR GAS-CUT FIELD DATA JOURNAL OF PETROLEUM TECHNOLOGY, 1975, 27 (AUG): : 944 - 948
- [27] Efficiency of Application of Semiconductor Heat Pumps with a Solar Plant for Heating and Cooling of Buildings in Conditions of Central Asia. Geliotekhnika, 1975, (05): : 75 - 81
- [29] Thermal Properties of Solar and Heat Pump Heating Systems for Estimation of the Operational Costs. Tiedonanto - Valtion Teknillinen Tutkimuskeskus, LVI-Tekniikan Laboratorio/Report - Technical Research Centre of Finland, Laboratory of Heating and Ventilating, 1981, (56):
- [30] STANDARD METHODS FOR MEASURING THE AIRBORNE NOISE FROM HYDRAULIC PUMPS. Hydraulic Pneumatic Mechanical Power, 1979, 25 (289): : 13 - 19