The last figure is a detailed breakout of our FY 1973 expenditures on the survey. TABLE OF ISOEXPOSURE LEVELS at mi/yr_at_3 A none nnn nn en ne ene eee eee 2.04 Bo n---een ence nee nee eee nee 17.8 3.06 | 26.8 ( --------------------------- 4.08 38.6 D --------------------------- 8.16 71.6 Bi ------- 2 eee een ene eee 16.3 143 F --------------------------- 32.6 286 G ---------- 2-2-2222 eee eee 65.3 574 H --------------------------- 131 1150 J ---------- 22-2 2-- eee 261 2290