Synthesis and properties of model compounds for the active... : II. synthesis of glycyl...ethylesters / A. van de Linde ; uitg. RVO/TNO Chemisch Laboratorium Chemistry and toxicology of paints / D.M.W. Elskamp apparatus for the automatic determination of the penetration time / F.H. Meppelder ; uitg. R.V.O./T.N.O. Chemisch Laboratorium Concentrating dilute aerosols by electrostatic methods / J.F. van der Wal ; uitg. R.V.O./T.N.O. Chemisch Laboratorium use of semi-micro techniques in infrared spectroscopy / F.H. Meppelder ; uitg. R.V.O./T.N.O. Chemisch Laboratorium 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