It seems that everyone agrees that Louis Blanc was the first to say "à chacun selon ses besoins, de chacun selon ses facultés", which is often translated as "from each according to his abilities, to each according to his needs."
His authorship is listed by tons of web quotes pages, as well as original sources, such as:
The formula of association then is as follows; it is thus enunciated by Louis Blanc:
From each according to his ability.
To each according to his needs.
Most web quote pages attribute the quote to 1839 L'Organisation du travail (study of Labor organizations).
But when I tried to search "L'Organisation du travail" (the French text of the work), I got no results.
When and where did Louis Blanc say the famous "from each according to his abilities..."?