000
00305nam a2200133Ia 4500
008
161121s9999 xx 000 0 und d
100
_a
DOWNS. R. J ; HELLMERS. H
245
0
_a
Environment & the experimental control o
260
_c
NIL
365
_b
0
650
_a
NIL
652
_a
#N/A
942
_c
BK
999
_c
46138
_d
46138