I herewith d e c l a r e t h a t I consider Meaars F,A.L«BISSflS,
J.F.SIEBUHGH and J«WILS ae s e r i o u s and oapable gentlemen and
recommand t h a t t h e i r p r o j e o t be c a r e f u l l y s t u d i e d .
(J•Tinbergen,
Professor of S t a t i s t i c s Rotterdam School of SotMiomios,
D i r e c t o r of the C e n t r a l Planning Office of the Dutch
Govemiaent).