Wilman, M. 1933. The rock-engravings of Griqualand West and Bechuanaland, South Africa. Cambridge, Deighton Bell and Kimberley, Alexander McGregor Memorial Museum. pp. i-xii, 1-77, pls. 1-70. { 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 min-w-64 flex items-center justify-between gap-5 border border-solid px-5 py-2 cursor-pointer transition-colors"> PDF download available