TY - BOOK AU - Hellman,Hal TI - Lasers AV - TK7871.3 .H4 U1 - 621.32/9 PY - 1968///] CY - Oak Ridge, Tenn.] PB - U.S. Atomic Energy Commission, Division of Technical Information KW - Lasers N1 - Cover title; Bibliography: p. 53-55 ER -