Thomas The Tank Engine And Friends, Pop Goes The Diesel, Dirty Work, A Close Shavebased on The railway series by W. Awdry1987PDF2.4 MBEN
Experimental Study of Pump and Seal Characteristics of Helical Groove Geometry Incorporated in a Combined Bearing and Pump / Lawrence P. Ludwig, Thomas N. Strom, and Robert L. Johnson.Lawrence P. Ludwig1969EN