(September 1993) “Abundant mitochondrial DNA variation and world-wide population structure in humpback whales”, Proceedings of the National Academy of Sciences90 (17), p. 8239–8243. doi:10.1073/pnas.90.17.8239. Bibkodo:1993PNAS...90.8239B. “Before protection by international agreement in 1966, the world-wide population of humpback whales had been reduced by hunting to <5000, with some regional subpopulations reduced to <200...”.
(September 1993) “Abundant mitochondrial DNA variation and world-wide population structure in humpback whales”, Proceedings of the National Academy of Sciences90 (17), p. 8239–8243. doi:10.1073/pnas.90.17.8239. Bibkodo:1993PNAS...90.8239B. “Before protection by international agreement in 1966, the world-wide population of humpback whales had been reduced by hunting to <5000, with some regional subpopulations reduced to <200...”.