共 4 条
[1]
ANALYSIS OF CONCENTRATION AND DETECTION OF UNDERLYING FACTORS IN STRUCTURED TABLES
[J].
VEGETATIO,
1979, 40 (01)
:49-54
[2]
LITTLE EL, 1953, USDA AGR HDB, V41
[3]
STEPHENS GR, 1970, B CONNECTICUT AGR ST, V707
[4]
VANHULST R, 1978, VEGETATIO, V38, P65