"Part of the same material has been used in lectures given at the Sorbonne in the early months of 1918 and published by Cres & cie. under the title of...
"Part of the same material has been used in lectures given at the Sorbonne in the early months of 1918 and published by Cres & cie. under the title of Essais de med́ecine sociale."--Pref.