Sumathipala, A.; De Silva, N.; Siribaddana, Sisira; Fernando, D.S.J.; Abeysinghe, M.R.N.
(Research Gate, 2001-01)
We report the process of adaptation into Sinhala of a questionnaire given to mothers of twins to determine zygosity. Adaptation and validation was carried out in three stages. Firstly, we used a nominal group to translate ...