References

RRÅ, V.kh., 2, 6.2
  cunnaṃ kūrpaṃ śaṅkhaśuktivarāṭaiḥ śuklavargakaḥ //Context
RRÅ, V.kh., 3, 66.2
  śudhyanti ṭaṅkaṇaṃ śaṃkho varāṭāñjanagairikam /Context