An upgraded HO replica of Baldwin's VO1000, one of the manufacturer's first diesel switchers, is available from Bowser. The model is based on Stewart Models tooling, and you'll find a review of that model in the April 2001 Model Railroader. The HO scale version is available as a direct...
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A review of State compulsory immunization laws revealed that 26 States and the District of Columbia now have legislation requiring immunization against a d... CL Jackson - 《Public Health Reports》 被引量: 84发表: 1969年 On the Effectiveness of state anti-corporate farming laws in the United ...
These less predictable innovations are perceived as "inventive solutions" [3, 6, 7] and are associated usually with "creative leaps" (see the detailed review in [8]). These inventions require less adjustment effort by the manufacturer and although they tend to be "new to the world" they ...