O umo<chr_abbr type="reg" class="dc" expan="" cert="no">t-hbar</chr_abbr> b<chr_abbr type="reg" class="dc" expan="" cert="no">n-hbar</chr_abbr> vo<chr_var letter="s" var="long">∫</chr_var> her<unclear reason="illegible">be<chr_abbr type="" class="" expan="" cert="no">[apost]</chr_abbr></unclear>gera J. 