00337nam a2200109Ia 4500008004100000041000800041082002800049100001300077245006800090260006000158300000900218230411s9999    xx            000 0 und d  aeng  aCH/613.08691/FER/B03728  aFerron S  aHygiene Promotion : Practical manual for relief and development  bIntermediate Technology PublicationaPhiladelphiac2000  a250p