In the 1970s he donated the studio 's photographic collection consisting of 150.000 negatives to the directorate of general archives .
In the 1970s he worked for their preservation until his death in 1984 .
In the 1970s he donated the studio 's photographic collection consisting of 150.000 negatives to the directorate of general archives and worked for their preservation until his death in 1984 .