00323nam a2200133Ia 4500003000400000005001700004008004100021040000900062082001500071100001600086245003900102260003900141300000900180OSt20200918111414.0190216s9999||||xx |||||||||||||| ||und||  coclc  a535bNOA/T  aNoakes, G R 0aA Text Book Of Light /cG R Noakes  bMacmillan &co Ltd,aLondon:c1962.  a355p