共 3 条
[1]
Edwards C. J., 1953, P BRIT WEED CONTROL, P348
[2]
ELLIOT KR, 1952, 8 CAN DEP AGR SCI SE
[3]
THE CASCADE IMPACTOR - AN INSTRUMENT FOR SAMPLING COARSE AEROSOLS
[J].
JOURNAL OF SCIENTIFIC INSTRUMENTS,
1945, 22 (10)
:187-195