1998
January Vol 157, Num 1: 1 - 341	February Vol 157, Num 2: 349 - 668	March Vol 157, Num 3: 677 - 1002, S1 - S53
April Vol 157, Num 4: 1009 - 1350, S57 - S171	May Vol 157, Num 5: 1361 - 1698, S173 - S207	June Vol 157, Num 6: 1705 - 2010, S209 - S248
July Vol 158, Num 1: 1 - 342	August Vol 158, Num 2: 349 - 682	September Vol 158, Num 3: 689 - 1007
October Vol 158, Num 4: 1017 - 1307	November Vol 158, Num 5: 1369 - 1688 Supplement: Respiratory Health Hazards in Agriculture : S1 - S76 Supplement: 13TH TRANSATLANTIC AIRWAY CONFERENCE : S77 - S206	December Vol 158, Num 6: 1697 - 2015