Ships and marine technology – Polypropylene fibre ropes made of yarns produced on bast fibre spinning systems
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/1998

Ships and marine technology – Polypropylene fibre ropes made of yarns produced on bast fibre spinning systems
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/2017