Xibei diqu gushengwu tuce: Qinghai fence [Palaeontological atlas of northwest China: Qinghai fascicle.]. Volume 2. Corals, Bryozoa, Trilobites, Graptolithoidea, fossil plants. Geological Publishing House, Peking, 1979: i-v, 1-219. 33 [Zoological Record Volume 116]