共 29 条
[11]
FRANCIS AJ, 1980, INT C ECOL IMPACT AC, P35
[14]
HAUGBOTN O, 1976, MEDL NOR LANDBRUKSHO, V55, P1
[15]
HOVLAND J, 1975, EFFECTS SIMULATED AC, P15
[16]
JOHNSON NM, 1979, SCIENCE, V204, P497, DOI 10.1126/science.204.4392.497
[17]
JONSSON B, 1972, 20 UPPS I SKOGSPR RA, P48