Recent Progress in Microcalorimetry E. Calvet, H. Prat E-Book (pdf)

Heating versus Cooling in Galaxies and Clusters of Galaxies H. Böhringer, G.W. Pratt E-Book (pdf)

Modern Methods of Plant Analysis / Moderne Methoden der Pflanzenanalyse K. Biemann, F. A. Hommes, O. Kratky E-Book (pdf)