Twins - Psychology.

Twins in the world = the legends they inspire and the lives they lead/ by: (書目-電子資源)

Twin and triplet psychology : = a professional guide to working with multiples / by: (書目-語言資料,印刷品)

Not all twins are alike = psychological profiles of twinship / by: (書目-電子資源)

Twins- Psychology.

Triplets- Psychology.