<nowiki>Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Вилли Кох; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; Willi Koch; pittore svizzero; peintre suisse; margolari suitzarra; Swiss painter (1909-1988); kunstschilder uit Zwitserland (1909-1988); pintor suís; pintor suizu; Schweizer Maler (1909-1988); pintor suíço; pintor suízo; رسام سويسري; péintéir Eilvéiseach (1909-1988); pintor suizo; Wilhelm Hartmann Hermann Koch</nowiki>
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