By Rosenberg, Sheldon, Abbeduto, Leonard, Abbeduto, Leonard
By Green, Georgia M.
By C. Collins, John N. Mangieri, Cathy Collins
By Marc H. Bornstein (Eunice Kennedy Shriver National Institute of Child Health and Human Development, USA)
By Marc H. Bornstein (National Institute of Child Health and Human Development, Bethesda, MD, USA), Marc H. Bornstein
By Marc H. Bornstein (National Institute of Child Health and Human Development, Bethesda, MD, USA)
By L. B. Resnick, W. W. Ford