00517cam a2200157   4500001001100000005001700011008004100028020001500069100002400084245007700108260004400185300000900229650002700238650004400265650005000309000000711320230921134707.0150417s1987                  000 0 eng d  a07062445671 aGreenstreet, Derek.10aWays to display :ba practical guide for teachers. /cDerek Greenstreet.  aLondon :bWard Lock Educational,c1987.  a78p. 0aDisplays in education. 0aEducation, ElementaryxAudioxvisual 8. 7aElementary educationxAudioxvisual 8.2sears