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What types of research is used to establish developmental milestones and trends?

2006-09-04 10:56:12 · 1 answers · asked by Tia B 1 in Social Science ➔ Psychology

1 answers

social and, economic changes as, projected over a period of decades.

2006-09-04 11:01:57 · answer #1 · answered by ny21tb 7 · 0⤊ 0⤋

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