The Saga of $h_c$ and $h_b$ Search in Heavy Quarkonia
  In this brief review, we examine carefully and critically the status of search for the $h_c$ [$\psi(1^1P_1)$] charmonium state and the $h_b$ [$\Upsilon(1^1P_1)$] bottonium state, initiated by the E760 experiment. Recent experimental studies at CLEO/BABAR/BELLE are examined in the light of new theoretical and phenomenological understanding. 
T. Barnes, T.E. Browder and S.F. Tuan