Bormann, Peter IASPEI new manual of seismological observatory practice NMSOP; v. 1 & 2. Peter Bormann - Germany GeoForschungsZentrum Potsdam 2002 - col. plates; figs; illus ISBN: 3-9808780-0-7 Subjects--Topical Terms: IaspeiObservatory Practice ManualSeismological Observatory Practice Universal Decimal Class. No.: 550.389 / BOR