共 6 条
[1]
[Anonymous], AUSTR GUID TREATM AD
[2]
Campbell D.T., 1966, Experimental and quasi-experimental designs for research
[3]
Elster Jon., 1989, CEMENT SOC
[4]
*GGZ LAND STUURGR, 2007, MULT RICHTL VROEGT P
[5]
Martin M, 1994, READINGS PHILOS SOCI
[6]
POPPER KR, 1972, OBJECTIVE ERKENNTNIS