by Wafula, E M, Onyango, F E, Thairu, H, Boleij, J S, Hoek, F, Ruigewaard, P, Kagwanja, S, De Koning, H, Pio, A, Kimani, E
Published in East African medical journal (01.01.1990)

by Oude Vrielink, H.H.E, Ruigewaard, P, Tamsma, P
Year of Publication 2006

by Oude Vrielink, H.H.E, Ruigewaard, P, Tamsma, P
Year of Publication 2006

by Attwood, P, Brouwer, R, Ruigewaard, P, Versloot, P, de Wit, R, Heederik, D, Boleij, J S
Published in American Industrial Hygiene Association journal (01.08.1987)