Title: Wirkungsvergleich von Solanum malacoxylon, Trisetum flavescens, 1,25-Dihydroxycholecalciferol, 1,25-Dihydroxyergocalciferol [Dihydroxycholecalciferol, Dihydroxyergocalciferol] und 24,25-Dihydroxycholecalciferol [Dihydroxycholecalciferol] an rachitischen Hühnerküken