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For services » • ' . y> V • r.raTTP 1CATIONS (l) it 18 hereby certified that tMs is Invoice fig applying to >«HJT-TP& Subproject 1QA. that performance is satisfactory, ^// Jhi Tarvicss are being accomplished in accordance with* rest and that payaent - thereof has not yet been safe * - . • ' 'i'\r • »f • ' « c- : -. sroN£f~GaTTbro7 Chief, tss/cd Date i ; s.’ (9 \ It iVvereby certifi^l that this invoice applies to ^LTRA.. Lbprojeovla/vhlcti v^ d^y ^vci, ^ % AprU gg* -?£ ^ fn subsequent seiaoranda, . :•'. ••• ' ‘ ^ * Research Director Date: .ilV-OiV