Bertrand, A. 1899. The kingdom of the Barotsi: Upper Zambezia; a voyage of exploration in Africa, returning by the Victoria Falls, Matabeleland, the Transvaal, Natal, and the Cape. London, T. F. Unwin: pp. i-xx, 1-304. { copied = true; setTimeout(() => copied = false, 10000); }).catch(err => { console.error('Failed to copy:', err); }); " type="button" :class="copied ? 'bg-secondary border-secondary' : 'border-primary hover:bg-primary'" class="group lg:min-w-64 flex items-center justify-between gap-5 border border-solid px-5 py-2 cursor-pointer transition-colors"> PDF download available