Warnecke R B, Ferrans C E, Johnson T P, Chapa-Resendez G, O'Rourke D P, Chávez N, Dudas S, Smith E D, Mártinez Schallmoser L, Hand R P, Lad T
Survey Research Laboratory, College of Urban Planning and Public Affairs, University of Illinois at Chicago 60680, USA.
J Natl Cancer Inst Monogr. 1996(20):29-38.