Table 6: Values of G for several samples of spiral galaxies.
Sample Band N $\sigma_{\rm TF}$ G Reference

A82 field sample H_-0.5 359 0.47 4.0 Willick et al. (1997) (Mark III)

MAT field sample I 1355 0.43 8.6 Mark III

W91PP field sample r 326 0.38 5.0 Mark III

CF field sample r 321 0.38 4.7 Mark III

Great Wall spirals I 172 0.32 4.2 Dell'Antonio et al. (1996)

Spirals in clusters I 522 0.38 6.0 Dale et al. (1999)

Spirals in clusters $J, H, K_{\rm s}$ 153 0.48 2.6 Bamford (2002)

RFGC $J, H, K_{\rm s}$ 971 0.42 7.4 This work

**Table 6:** Values of G for several samples of spiral galaxies.
Sample	Band	N	$\sigma_{\rm TF}$	G	Reference
A82 field sample	H_-0.5	359	0.47	4.0	Willick et al. (1997) (Mark III)
MAT field sample	I	1355	0.43	8.6	Mark III
W91PP field sample	r	326	0.38	5.0	Mark III
CF field sample	r	321	0.38	4.7	Mark III
Great Wall spirals	I	172	0.32	4.2	Dell'Antonio et al. (1996)
Spirals in clusters	I	522	0.38	6.0	Dale et al. (1999)
Spirals in clusters	$J, H, K_{\rm s}$	153	0.48	2.6	Bamford (2002)
RFGC	$J, H, K_{\rm s}$	971	0.42	7.4	This work

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