Book review: Kushan and Kushano-Sasanian Seals and Kushano-Sasanian Coins: Sasanian Seals in the British Museum (Corpus Inscriptionum Iranicarum Part III: Pahlavi Inscriptions. Vol. vi: Seals and Coins. Plates. Portfolio I: Plates I-XXX) (authored by: A. D. H. Bivar)