Walkaway survey; 6 successive groups of 36 phones phone spacing 10 feet, inner offset 50 feet survey=land area=Turkey source=Dynamite spread=offend n1=1250 d1=.004 f1=.004 label1="Time (sec)" n2=216 d2=.010 f2=.050 label2="Offset (km)" n3=1 title="Oz 19" plottpow=-0.153809