Angella D. Ferguson
... that Angella D. Ferguson discovered that African-American infants learned to sit and stand at a younger age than European-American babies?
... that <b id="mwA0U"><a href="./Angella_D._Ferguson" id="mwA0Y" rel="mw:WikiLink" title="Angella D. Ferguson">Angella D. Ferguson</a></b> discovered that African-American infants learned to sit and stand at a younger age than European-American babies?