By Swartz T.A.   Handsher R.   Manor Y.   Stoeckel P.   Barkay A.   Mendelson E.   Leventhal A.   in Vaccine

ISSN:0264-410X|16|20|2090-2095

Elsevier‎(1998)‎

Access to resources Favorite 7.747123

By Heard A.   Swartz T.   in Public Choice

ISSN:0048-5829|97|4|701-707

Springer Publishing Company ‎(1998)‎

Access to resources Favorite 4.9369445