TY  - BOOK
AU  - Casas,Willie
TI  - New threat: 2-strain infection
KW  - 2-strain infection
KW  - new threat
UR  - http://elibrary.doh.gov.ph/cgi-bin/koha/opac-retrieve-file.pl?id=f2e5cd5624a9d0b6aad1549d989d8193
ER  -