Table 6.
Membership patterns of city tree managers, 1986.
Number reporting
% of 6,664 cities
% of 2,787 sampled cities
% of 1,062 returns
% of 660 responses
ISA
214
3
8
20
33
SMA
49
1
2
5
8
NRPA
198
3
7
19
31
SAF
55
1
2
5
9
ICMA
58
1
2
5
9