"Nourrissons Santé et hygiène." . . . . "Enfants Santé et hygiène." . . "Jumeaux." . . "Zwilling (Motiv)" . . "Pediatrie." . . "Twins." . . . . . . . . . . . . . . . . . . . . "The nature and nurture of twins" . . . "The nature and nurture of twins"@en . . . . "Multiple Birth Offspring." . . "Child Care methods." . . "Pregnancy, Multiple." . . "Twins psychology." . . "Infant Care methods." . .