*Springer SP - Searleman A,Laterality in twins: the relationship between handedness and hemispheric asymmetry for speech, Behav Genet. 1978 Jul;8(4):349 | *Springer SP - Searleman A,Laterality in twins: the relationship between handedness and hemispheric asymmetry for speech, Behav Genet. 1978 Jul;8(4):349 |