23,4=25; 46,6=48; 47,5=49; 48,4=50; 50,4=52; 51,5=53; 53,1=54; 53,3=55 von:
Road School (ZDB): Proceedings of the Annual Road School (SLUB)
30,2=2; 31,6=3; 33,4=4; 34,4=5; 35,5=6; 36,6=7; 38,1=8 u.a. von:
Industrial Waste Conference (ZDB): Proceedings of the ... Industrial Waste Conference (SLUB)
44,5=104; 46,6=111; 47,5=113; 48,4=116; 50,4=123; 51,5=128; 53,1=131; 53,3=133 von:
Engineering extension series (SLUB)