Review of the medical problems encountered in deep sea diving / E. Meeter efficiency of electrostatic air filters in a SPF rat breeding unit / J.L.F. Gerbrandy, D. van der Waay and H.C. Bartlema Structure of the replicative form of bacteriophage IX 174... / P.H. Pouwels, J. van Rotterdam and J.A. Cohen Radiosensitization of biologically active D.N.A. in cellular extracts... / J.J. van Hemmen, W.J.A. Meuling and J.F. Bleichrodt Mutagenesis by ultraviolet radiation in bacteriphage...in the host bacterium / J.F. Bleichrodt and W.S. Verheij Fast and easy production of monolayer plaque assay slides / G.D. Majoor, M.B. van 't Veer and O.B. Zaalberg changed ATP-dependant DNAse...from Escherichia coli / B. van Dorp, R. Benne and F. Palitti Intermediate economic analysis for management and engineering / [by] John R. Canada book of the medieval knight / Stephen Turnbull Chirurgijns zee-compas : de medische verzorging aan boord van Nederlandse zeeschepen gedurende de Gouden Eeuw / A.E. Leuftink cambridge studies in medieval life and thought Crusading warfare, 1097-1193 / by R.C. Smail Regtspleging bij de landmagt : met toelichting en de aanteekeningen, bewerkt aan de hand van jurisprudentie, kamerstukken, dienstvoorschriften en legerorders, loopende tot medio Juni 1940 …