1. Validation of the Publication of New Names and New Combinations Previously Effectively Published Outside the IJSB: List No. 31
2. Fruchtkörperbildende Myxobakterien. V. Die Polyangium‐Arten: P. cellulosum, P. fumosum, P. sorediatum, P. vitellinum;Dawid W.;Mikrokosmos,1977
3. Über Polyangium parasiticum n.sp., eine submerse, parasitische Myxobacteriacee;Geitler L.;Arch. Protistenkd.,1925