全文获取类型
收费全文 | 5374篇 |
免费 | 118篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 945篇 |
工业经济 | 370篇 |
计划管理 | 830篇 |
经济学 | 1136篇 |
综合类 | 66篇 |
运输经济 | 29篇 |
旅游经济 | 75篇 |
贸易经济 | 836篇 |
农业经济 | 246篇 |
经济概况 | 957篇 |
邮电经济 | 3篇 |
出版年
2021年 | 34篇 |
2020年 | 74篇 |
2019年 | 115篇 |
2018年 | 132篇 |
2017年 | 147篇 |
2016年 | 134篇 |
2015年 | 71篇 |
2014年 | 141篇 |
2013年 | 530篇 |
2012年 | 164篇 |
2011年 | 207篇 |
2010年 | 163篇 |
2009年 | 161篇 |
2008年 | 157篇 |
2007年 | 143篇 |
2006年 | 124篇 |
2005年 | 93篇 |
2004年 | 98篇 |
2003年 | 96篇 |
2002年 | 94篇 |
2001年 | 125篇 |
2000年 | 109篇 |
1999年 | 88篇 |
1998年 | 104篇 |
1997年 | 74篇 |
1996年 | 75篇 |
1995年 | 91篇 |
1994年 | 59篇 |
1993年 | 84篇 |
1992年 | 76篇 |
1991年 | 81篇 |
1990年 | 73篇 |
1989年 | 76篇 |
1988年 | 66篇 |
1987年 | 70篇 |
1986年 | 74篇 |
1985年 | 78篇 |
1984年 | 90篇 |
1983年 | 66篇 |
1982年 | 70篇 |
1981年 | 67篇 |
1980年 | 76篇 |
1979年 | 65篇 |
1978年 | 46篇 |
1977年 | 49篇 |
1976年 | 41篇 |
1975年 | 48篇 |
1974年 | 33篇 |
1973年 | 39篇 |
1972年 | 33篇 |
排序方式: 共有5493条查询结果,搜索用时 15 毫秒
71.
Kathryn A. Boys Katherine DuBreuil White Gordon Groover 《Journal of Sustainable Tourism》2017,25(10):1474-1493
Geocaching is a modern-day version of “hide and seek” where participants use geographical longitude and latitude coordinates to locate a “geocache” using a GPS device or mobile app. An agriculturally focused geocache program could foster tourism, interest and educational opportunities about rural and agricultural areas, and could facilitate additional patronage of businesses that operate in these areas. As a prerequisite to such a program, however, organizations must commit to establishing and maintaining a geocache. This study explores the perceived benefits and constraints to an organization's participation in a rural or agriculturally focused geocache program. A case example of an agriculturally focused geocaching program, AgCache, is used as a starting point. In-depth interviews of program Founders and current participants explored the program's background and goals, and experiences of participating sites. Complimenting this, a survey collected information from potential host sites, and probit model analyses were used to assess influences on an organization's interest in hosting a geocache. While many organizations indicated that they would be interested in such a program, several indicated (addressable) concerns. Characteristics of the organization and respondent were found to significantly influence their interest. Findings are instructive for targeting and recruiting organizations into an agricultural or rural geocaching program. 相似文献
72.
73.
R. N. Maddox James Diers A. M. Bhairi P. A. Thomas-Cooper E. M. Elizondo 《Process Safety Progress》1987,6(2):112-117
Experimental equilibrium measurements are modeled using a Davies-like ionic strength correction term for the reaction equilibrium constants. Calculated and experimental results are in much better agreement when the ionic strength correction terms are used. 相似文献
74.
‘We are always willing to be trade partners, but never trade patsies’— President Ronald Reagan, State of the Union Message, Washington, 1987 相似文献
75.
76.
A new design combines reaction or extraction and separation in one unit. Here are practical working details. 相似文献
77.
78.
79.
A theory of persistent income inequality 总被引:7,自引:4,他引:7
Steven N. Durlauf 《Journal of Economic Growth》1996,1(1):75-93
This paper explores the dynamics of income inequality by studying the evolution of human capital investment and neighborhood choice for a population of families. Parents affect the conditional probability distribution of their children's income through the choice of a neighborhood in which to live. Neighborhood location affects children both through local public finance of education as well as through sociological effects. These forces combine to create incentives for wealthier families to segregate themselves into economically homogeneous neighborhoods. Economic stratification combines with strong neighborhoodwide feedback effects to transmit economic status across generations, leading to persistent income inequality. 相似文献
80.