(en) John MacGregor(en), Tibet. A Chronicle of Exploration, Routledge & Kegan Paul Ltd, London, 1970, en part. Part III (Thomas Manning), page 214 : « Obviously referring to Tibet's funeral customs, Manning quipped: 'The people of Tibet eat no birds… on the contrary they let the birds eat them.' »
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(en) John MacGregor(en), Tibet. A Chronicle of Exploration, Routledge & Kegan Paul Ltd, London, 1970, en part. Part III (Thomas Manning), page 214 : « Obviously referring to Tibet's funeral customs, Manning quipped: 'The people of Tibet eat no birds… on the contrary they let the birds eat them.' »