I'm looking for information about Carl Julius Bauer. He was born in February 1871 in Wuppertal close to Düsseldorf.
He had a 'import and export' company (Colonialwaarenhandlung?) at Lessingplatz in Düsseldorf. His wife Otilia Bauer, resumed the business after he died in 1920. She resumed it until about 1930.
Where can I find out more about this company?
Are there any lists or documentation of companies in Düsseldorf in the 1910/1920/1930's?
Thanks in advance,