On integrating the techniques of direct methods with anomalous dispersion: the one-phase structure seminvariants in the monoclinic and orthorhombic systems. III. Primitive non-centrosymmetric space groups of type 1P220. Erratum.

There are two errors in the short communication by Velmurugan & Hauptman [Acta Cryst. (1989). A45, 656]. On line 9 in the Abstract, Φ_2h′2k′0 should read Φ_2h2k0 and on line 3 in Summary of final results, Φ_2h′2k′0 should read Φ_2h,2k,0.