sundowning 发表于 2025-3-23 13:39:21
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https://doi.org/10.1007/978-3-8349-6896-8ative advantage to these differences. Its premises were under attack before the factor-proportions theory was revealed in its full maturity in 1933. Both Graham and Williams made major critiques but neither succeeded in dethroning the reigning concepts.. Ohlin’s expansion of Heckscher’s seminal pape