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	1.	[Authors of the past: Konrad Hartmann]. [electronic resource] by Usemann, K W Producer: 19780828 In: Gesundheits-Ingenieur vol. 99 Availability: No items available. Save to lists Add to cart (remove)
	2.	[Authors of the past: Hermann Rietschel]. [electronic resource] by Usemann, K W Producer: 19790324 In: Gesundheits-Ingenieur vol. 99 Availability: No items available. Save to lists Add to cart (remove)
	3.	[Sanitary engineers of yesteryear: Otto Krell]. [electronic resource] by Usemann, K W Producer: 19781129 In: Gesundheits-Ingenieur vol. 99 Availability: No items available. Save to lists Add to cart (remove)
	4.	[Authors of the past: Gottfried Stumpf]. [electronic resource] by Usemann, K W Producer: 19780715 In: Gesundheits-Ingenieur vol. 99 Availability: No items available. Save to lists Add to cart (remove)
	5.	[Current calculation methods for drainage conduits. Part I]. [electronic resource] by Usemann, K W Producer: 19781129 In: Gesundheits-Ingenieur vol. 99 Availability: No items available. Save to lists Add to cart (remove)
	6.	[New computation methods for drainage pipelines. II]. [electronic resource] by Usemann, K W Producer: 19790324 In: Gesundheits-Ingenieur vol. 99 Availability: No items available. Save to lists Add to cart (remove)
	7.	[Sewage-upsurge and discharge constants]. [electronic resource] by Usemann, K W Producer: 19780520 In: Gesundheits-Ingenieur vol. 99 Availability: No items available. Save to lists Add to cart (remove)
	8.	[Housing technology - retrospective view, current status and development]. [electronic resource] by Usemann, K W Producer: 19790725 In: Gesundheits-Ingenieur vol. 100 Availability: No items available. Save to lists Add to cart (remove)
	9.	[Joseph Strebel]. [electronic resource] by Usemann, K W Producer: 19780520 In: Gesundheits-Ingenieur vol. 99 Availability: No items available. Save to lists Add to cart (remove)
	10.	[25 years of the Water, Soil and Air Hygiene Institute]. [electronic resource] by Liese, W Usemann, K W Producer: 19770128 In: Gesundheits-Ingenieur vol. 97 Availability: No items available. Save to lists Add to cart (remove)