by Folkers, L F, Cerqueira, M T, Quick, R E, Kanu, J, Galea, G
Published in Emerging infectious diseases (01.07.1998)

by Kizer, K W, Folkers, L F, Felten, P G, Neimeyer, D
Published in American journal of preventive medicine (01.03.1992)

by Folkers, Lela F
Published in Health services research (01.10.1987)