RT Article T1 The illegitimacy of one-sided speculation: Getting the defensive gun use estimate down JF The journal of criminal law and criminology VO 87 IS 4 SP 1446 OP 1461 A1 Kleck, Gary 1951- A2 Gertz, Marc G. LA English YR 1997 UL https://krimdok.uni-tuebingen.de/Record/191258039X DO 10.2307/1144021