References

RAdhy, 1, 247.2
  yantras tumbīnalīnāṃ vai kartavyaḥ sattvapātane //Context
RAdhy, 1, 249.1
  sadṛśaiśca vidhṛtyāstumbīnalīmadhyato mukhīm /Context
RAdhy, 1, 417.2
  tena tumbīnalīyantramadhyaṃ lepyaṃ dṛḍhaṃ khalu //Context