1 Large pointing correction on some observations contributes to the listed error.
 2 Identification uncertain: Mean transit time 0.9 minutes later than 3C48; 
 2 unlikely to be refraction.
 3 Broad feature centered 2 minutes later than 4C31.05 : Total flux given.
 4 A 22-MHz map including this source is given by Roger (1969ApJ...155..831R).
 5 Broad emission centered 0.8 minutes earlier than 4C position : 
 5 Estimated size 65' NS by 60' EW.
 6 Confused with uncatalogued source ~12 minutes earlier.
 7 Calibration uncertain at large zenith angles.  
 8 Centered 1.4 minutes earlier than 4C13.17 : Caswell, Crowther, and 
 8 Holden (1967MmRAS..72....1C) show elongated source centered 1 minute early; 
 8 Abell 399/401 nearby, may be associated.
 9 Transits on average 0.7 minutes early : May be refraction.
10 Broad object centered 1.3{deg} north of 3C135 : 4C-01.15 may contribute.
11 Confused with uncatalogued sources following or Tau A sidelobe.
12 Broad object centered on 3C153 (estimated size 110' EW by 90' NS) or confusion 
12 of several sources : Total flux given.
13 May be broader in EW direction than at higher frequencies.
14 Transits 0.7 minutes early on average : May be refraction.
15 Confusing sources surrounding 3C196 or emission from broad region centered on 
15 source : Near Abell 637.
16 Confused with uncatalogued source ~5 minutes earlier.
17 Sometimes confused with uncatalogued source ~5.5 minutes later.
18 Transits 0.8 minutes earlier than 4C14.31, near R.A. of Abell 795 : Corrected 
18 for confusion with uncatalogued source ~5 minutes earlier.
19 Large pointing correction : 4C05.40 may contribute 20 f.u.
20 Corrected for confusion with uncatalogued source ~5 minutes later.
21 Possibility of up to 30 f.u. contribution from 4C07.31.
22 EW response broadened by ~20%.
23 Broad emission centered on 3C298 (~50' EW). May be associated with cluster.
24 Probably two-thirds of 22-MHz flux density is due to most northerly component 
24 listed by Macdonald, Kenderdine, and Neville (1968MNRAS.138..259M).
25 Primary calibration source.
26 Corrected for confusion with uncatalogued source ~8 minutes later.
27 Epoch 1966.5.