共 50 条
- [42] SOCIAL-SCIENCE AND THE CHARACTERISTICS OF SOCIAL-SCIENCE INFORMATION AND ITS USERS [J]. INTERNATIONAL FORUM ON INFORMATION AND DOCUMENTATION, 1983, 8 (01): : 11 - 15
- [50] RAILWAYS AND AGRICULTURAL-DEVELOPMENT IN THE SUDAN [J]. ANNALES DE GEOGRAPHIE, 1961, 70 (380): : 422 - 428