He started his career in Paris for a year until he returned to Switzerland from 1971 to 1979 to work in gravure . Burki started his career in Paris for a year , until he returned to Switzerland to work in rotogravure from 1971 to 1979 .
Beliau memulakan kerjayanya di Paris selama setahun sehingga beliau kembali ke Switzerland dari 1971 hingga 1979 untuk bekerja di gravure. Burki memulakan kerjayanya di Paris selama setahun, sehingga beliau kembali ke Switzerland untuk bekerja di rotogravure dari 1971 hingga 1979.