00316nam a2200109 a 450000500170000000800410001704100080005810000190006624500680008526400420015330000110019520260716124435.0260701s1978    ii            000 0 eng d  aeng1 aHarper, Robert10aNonverbel communication the state of the art /cHarper, Robert. 1aLondon :bJohn wiley and sons,c1978.  a355 p.