Book Review: Kunststoffe, Struktur, physikalisches Verhalten und Prüfung (Plastics, Structure, Physical Properties and Testing) (in two volumes), edited by late R. Nitsche and K. A. Wolf, in collaboration with numerous specialists. Vol.1: Structure and Physical Properties of Plastics (Vol.6 of the series: Chemistry, Physics and Technology of Plastics in Individual presentations) edited by K. A. Wolf . vol. II: Practical Testiing of Plastics. (Vol.7 of the Series: Chemistry, Physics and Technology of Plastics in individual presentations), edited by R. Nitsche concluded by P. Nowak