A3V 

The A3V dagger standard is HD 216956 = Alf PsA (Garrison94)

GrayGarrison89 lists four A3V standards: Bet Cir (A3Vb), Alf PsA & Bet Leo
(A3Va) and HD 23643 (A3Van).

Cowley69 used five A3V standards: Lam Gem, Bet Leo, 38 Lyn, Del UMa, Zet Vir

MK43 and Garrison79 used Alf PsA as their A3V standard. 

Abt68 used Coma T183 as their A3V standard. 

Skiff08 flagged two stars as A3V standards: HD 216956 (MK73) & BD+48_944 (MK78)

Morgan65 classified one A3V Hyad: HD 27962.

Gray01/03/06 list 5 nearby A3V. Their median HIP colors:
<B-V>(A3V) = 0.087 (+-0.002 sem, +-0.004 stdev; N=5)
<V-I>(A3V) = 0.083 (+-0.013 sem, +-0.023 stdev; N=5)

# No Standard
Morgan65 does not list an A3V standard

# Dagger standards
HD 216956 = Alf PsA = HR 8728
  A3V: MK43(stan),JM53,MK73,Garrison79(stan),Garrison94,HoukStandard
  A3Va: GrayGarrison89,Garrison96
  GrayGarrison89 list it as one of two low-vsini A3Va standards (with bet Leo)

# other excellent standard
HD 102647 = Bet Leo = HR 4534 
  A3V: MK43,JM53,Cowley69(stan),HoukStandard,GrayAtlas
  A3Va: GrayGarrison89,Garrison96
  GrayGarrison89 list it as one of two low-vsini A3Va standards (w/ Fomalhaut)

# other standards:
BD+48_944  (in Alpha Per cluster)
  A3V: MK78,Keenan85
  A5V?: Morgan71
  A4V: Petrie69
  A2: Heckmann58
  Weak pedigree besides MK78 use as A3V standard. 

HD 23643:
  A3Van: GrayGarrison89(stan)
  GrayGarrison89 list it as their high-vsini A3Va standard

HD 135379 = Bet Cir = HR 5670 = GJ 580.1
  A3Vb: GrayGarrison89
  GrayGarrison89 list it as their low-vsini A3Vb standard

38 Lyn
  A3V: MK43,Cowley69(stan)

Zet Vir  
  A3V: MK43,Cowley69(stan)

# Weak Standard
HD 56537 = Lam Gem = 54 Gem = HR 2763
  A3V: JM53,Cowley69(stan)
  A4IV: GrayGarrison89(for "AB")

HD 106591 = Del UMa 
  A3V: MK43, Jaschek64(all),Cowley69(stan),Jaschek78(JM53)
  A2Vn: Gray03,Abt95,GrayGarrison87(A2Van),Cannon(A2)
  Migrated from A3V (MK/JM53) to A2V (Gray/Garrison/Abt) - probably not good standard

Coma T183
  A3V: Abt68
  (need to follow up)