海量图书期刊资源,随时随地畅享阅读乐趣
Synthesis of Indolo and benzimidazoquinazolines and benzodiazepinesRobert L. Duncan Jr.; Grover C. Helsley; Robert F. Boswell · 1973
Altruistic voting and campaign contributionsRobert W. Helsley; Arthur O'Sullivan · 1994
Urban subcenter formationRobert W. Helsley; Arthur M. Sullivan · 1991
City formation with commitmentRobert W. Helsley; William C. Strange · 1994
Strategic growth controlsRobert W. Helsley; William C. Strange · 1995
Mixed markets and crimeRobert W. Helsley; William C. Strange · 2005
Private governmentRobert W. Helsley; William C. Strange · 1998
Stolen Gun ControlRobert W. Helsley; Arthur O'Sullivan · 2001