He coauthored with Frances Ilg two childrearing guides, Infant and Child in the Culture of Today in 1943, and The Child from Five to Ten in 1946.
В соавторстве с д-р Фрэнсис Илг разработал два руководства по уходу за ребёнком Infant and Child in the Culture of Today, 1943, и The Child from Five to Ten, 1946.