Association between ozone and asthma emergency department visits in Saint John, New Brunswick, Canada.

nork Stieb, D M, Burnett, R T, Beveridge, R C, Brook, J R
Argitaratua 1996

Effectiveness of Haemophilus influenzae type b vaccines.

nork Stieb, D M, Frayha, H H, Oxman, A D, Shannon, H S, Hutchison, B G, Crombie, F S
Argitaratua 1990