by Berzon, D R
Published in American journal of public health (1971) (01.06.1978)

by Berzon, D R, Farber, R E, Gordon, J, Kelley, E B
Published in American journal of public health (1971) (01.03.1972)

by Berzon, D R, DeHoff, J B
Published in Public health reports (1974) (01.07.1974)

by Gordon, Joseph
Published in The Journal of school health (01.03.1972)