.
Ha, Hb, Hc, Hd, He, Hf, Hg, Hh, Hi, Hj, Hk, Hl, Hm,
Hn, Ho, Hp, Hq, Hr, Hs, Ht, Hu, Hv, Hw, Hx, Hy, Hz, HNr
HREELS (High Resolution Electron Energy Loss Spectroscopy )
Hrushovski construction
A - B - C - D - E - F - G - H - I - J - K - L - M -