E. Day

The development of language in twins: I. A comparison of twins and single children

E. Day, 1932 .

Deleted chromosome 18 with paternal mosaicism.

W. Davidson, W. Davidson, P. A. Macdonald, 1967, Lancet.

Familial aggregation of a "new" connective-tissue disorder: a nosologic problem.

J. Welch, K. Aterman, D. L. Roy, 1971, Birth defects original article series.

The development of language in twins: II. The development of twins: their resemblances and differences

Ella J. Day, E. Day, 1932 .