00332cam a2200121ua 4500020001800000041001000018082002000028100002300048245008400071260003800155300001200193504000500205  a0-486-22947-5  aengh  a681.111bWAU/SU  aWaugh, Albert.E  .  aSundials : Their theory and construction / cE.Albert Waugh.hTextual Documents  a : bDover Publications , c1972.  a245 ; .  a