...The development of mine and factory industries in theSouthern States in the past two decades has been one of the mostremarkable in industrial history... 
Booker T. Washington, et al. 「The Negro Problem」
...For the past two decades ThomasMacDougall, a resident of New York City, has spent his winterscollecting biological specimens in southern México...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...Although herpetologists have been working intensivelyon American colubrids for many decades, the relationshipsof the majority of the groups are not well understood...
William E. Duellman 「Systematic Status of the Colubrid Snake, Leptodeira discolor Gunther」
...Some decades before Admiral Perry appeared there were patriots secretly working against the Tokugawa Shogunate...
Sidney L. Gulick 「Evolution Of The Japanese, Social And Psychic」
...But many decades will doubtless pass before the cultivated classes of Japan will reach, in this respect, the standard of the corresponding classes of the West...
Sidney L. Gulick 「Evolution Of The Japanese, Social And Psychic」
...But a marked change has come over vast numbers of the people during the last three decades...
Sidney L. Gulick 「Evolution Of The Japanese, Social And Psychic」
...The numbers of careful studies of animal gastrulation that have been made inthe last few decades have completely established the views I have expounded,and which I first advanced in the years 1872–76...
Ernst Haeckel 「The Evolution of Man」
...Unfortunately, the numerous fossil remains of Permian and Triassic Tocosauriathat we have found in the last two decades are, for the most part, veryimperfectly preserved...
Ernst Haeckel 「The Evolution of Man」
...197-8) some decades back in the sixth century...
Various 「The American Journal of Archaeology, 1893-1」
...Flourished last two decades of fifteenthcentury...
Bernhard Berenson 「The Florentine Painters of the Renaissance」
...Kleig knew thathad he been able to do it in two years,or two decades, it still would havebeen in the nature of a miracle...
Various 「Astounding Stories of Super-Science April 1930」
...The decades are laidoff horizontally...
Oliver Lodge 「Pioneers of Science」
...Thosestars may have been smitten out of existence decades of centuriesago, but their poured-out light is yet flooding the heavens...
Henry Warren 「Recreations in Astronomy」
... Two decades later she wasfated to be unexpectedly reminded of him by the Federal authorities...
Emma Goldman 「Anarchism and Other Essays」
... The A B C student of economics knowsthat the productivity of labor within the last few decades farexceeds normal demand a hundredfold...
Emma Goldman 「Anarchism and Other Essays」
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