00330nam a22001097a 4500020002200000082001200022100004200034245008100076260004100157300000800198650001400206  a978-0-14-031548-0  a306 BER  aBerger, Peter L. and Luckmann, Thomas  aThe Social Construction of Reality: A treatise in the sociology of knowledge  aLondon, EnglandbPenguin Booksc1991  a249  aSociology