Preparative acetylenic chemistry / [by] L. BrandsmaPreparative acetylenic chemistry / Lambert Brandsma ; with contributions on experimental work from Yvonne A. Heus-Kloos, Roberto van der Heiden, Hermann D. VerkruijsseSynthesis of acetylenes, allenes and cumulenes : a laboratory manual / L. Brandsma and H.D. VerkruijsseNieuwe typen van onverzadigde ethers, thioethers en selenoethers / door Lambert Brandsma