λ6 cm images of SNRs. Polarized intensity is encoded in images, while contours show total intensities. Bars indicate B-vectors (observed E-vectors + 90°). The starting levels and the contour step intervals (both in mK T_B) are for G16.2−2.7: 20 and 6, for G21.8−0.6: 800 and 250, for G30.7 + 1.0: 10 and 15, for G34.7−0.4: 500 and 300, for G36.6−0.7: 20 and 10, for G39.2−0.3: 250 and 150, for G46.8−0.3: 50 and 50, for G53.6−2.2: 6 and 15, for G54.4−0.3: 50 and 20, for G65.7+1.2: 30 and 15, for G67.7+1.8: 5 and 8, and for G69.7+1.0: 30 and 8.