@conference {2947, title = {La collection Cros de la Biblioth{\`e}que nationale de France}, booktitle = {Histoire des techniques cin{\'e}matographiques : o{\`u} en sommes-nous ?}, year = {2014}, month = {17/10/2014}, publisher = {Cin{\'e}math{\`e}que fran{\c c}aise, Conservatoire des techniques cin{\'e}matographiques}, organization = {Cin{\'e}math{\`e}que fran{\c c}aise, Conservatoire des techniques cin{\'e}matographiques}, address = {Paris, Cin{\'e}math{\`e}que fran{\c c}aise}, author = {Xavier Loyant and Marianne Deraze} }