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- [42] HEAVY-DUTY LAUNDRY POWDERS ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1981, 181 (MAR): : 10 - ACSC
- [44] Heavy-duty objective, lightweight result: spicer introduces the first aluminum driveshaft for heavy-duty vehicles DES Diesel Equip Supt, 11 (90):
- [49] HEAVY-DUTY ROADHEADERS MODERNIZED FOR TUNNELING HIGHWAY & HEAVY CONSTRUCTION, 1984, 127 (12): : 54 - 55