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 report optical aerosol concentration-meter... : The relation between floating dropdiameter to dropspot diameter / L.A. Clarenburg Properties of uvre mutants of Escherichia coli K12... / I.E. Mattern and P.C. Houtman Organophosphorus compounds : Derivation of the molecular rotation ... / H.L. Boter / RVO/TNO. Chemisch Laboratorium Natuurwetenschap en krijgskunde / symposiumvoorz. P.L. Walraven report optical aerosol concentration-meter... : A sensitive light transmission meter / L.A. Clarenburg