共 50 条
- [41] A National Survey of U.S. Pharmacists in 2000: Assessing nonresponse bias of a survey methodology AAPS PharmSci, 3 (4):
- [42] The Drop-off and Pick-up Method: An Approach to Reduce Nonresponse Bias in Natural Resource Surveys Small-scale Forestry, 2011, 10 : 305 - 318