†Szechuanella Chang Wen-t'ang & Fan Chia-sung 1972

Chang Wen-t'ang & Fan Chia-sung 1972. Class Trilobita of the Ordovician and Silurian periods of the Ch'i-lien Mountains. Geological Gazetteer of the Ch'i-lien Mountains. Peiping 1960. Vol. 4(1). 162 pp., 1972: Unpaginated. Chapter pagination: Unpaginated