דולפין נהרות סיני – הבדלי גרסאות

* [[1958]] - –[[1962]] - בהשראת [[הקפיצה הגדולה קדימה]] מקועקע מעמדו המסורתי המכובד של דולפין הנהרות.

| align="center"| [[1979]] - –[[1981]]{{הערה|1=Zhou, K.; Li, Y., Nishiwaki, M., Kataoka, T. (1982). "A brief report on observations of the baiji (Lipotes vexillifer) in the lower reaches of the Yangtze River between Nanjing and Guichi.". Acta Theriologica Sinica 2: 253–254. }}

| align="center"| [[1978]] - –[[1985]]{{הערה|1=Lin, K.; Chen, P. and Hua, Y. (1985). "Population size and conservation of Lipotes vexillifer.". Acta Zoologica Sinica 5: 77-85. [translated by C.H. Perrin, edited by W.F. Perrin, Southwest Fisheries Science Center Administrative Report LJ-86-27}}

| align="center"| [[1985]] - –[[1986]]{{הערה|1=Chen, P. & Hua, Y. (1989) Distribution, population size and protection of Lipotes vexillifer. pp. 78–81 In W.F. Perrin, R. L. Brownell, Jr., K. Zhou and J. Liu (eds.), Biology and conservation of the river dolphins. Occasional Papers of the IUCN Species Survival Commission, No. 3. }}

| align="center"| [[1979]] - –[[1986]]{{הערה|1=Zhou, K. and Li, Y. 1989. Status and aspects of the ecology and behaviour of the baiji (Lipotes vexillifer) in the lower Yangtze River. pp. 86–91 In W. F. Perrin, R. L. Brownell Jr., K. Zhou and J. Liu (eds.), Biology and conservation of the river dolphins. IUCN Species Survival Commission Occasional Paper 3. }}

| align="center"| [[1987]] - –[[1990]] <Ref>Chen, P.; Zhang, X., Wei, Z., Zhao, Q., Wang, X., Zhang, G. and Yang, J. (1993). "Appraisal of the influence upon baiji, Lipotes vexillifer by the Three-gorge Project and conservation strategy.". Acta Hydrobiologica Sinica 17: 101-111. </ref>

| align="center"| [[1989]] - –[[1991]] <Ref>Zhou, K.; Sun, J. and Gao, A. (1993). "Photo-identification and population monitoring of the baiji (Lipotes vexillifer) on the lower Yangtze.". Working paper presented to Baiji Population and Habitat Viability Workshop, Nanjing, China. June 1–4 1993. </ref>{{הערה|1=Zhou, K.; Sun, J. and Gao, A. (1993). "The population status of the baiji in the lower reaches of the Yangtze.". Working paper presented to Baiji Population and Habitat Viability Workshop, Nanjing, China. June 1–4 1993. }}

| align="center"| [[1991]] - –[[1996]]{{הערה|1=Wang, D.; Zhang, X., Liu, R. (1998). "Conservation status and the future of baiji and finless porpoise in the Yangtze River of China.". Report on the eight international symposium on river and lake environments. ISRLE’96, Wuhan, China.}}