=LDR 22 4500 =001 3181 =082 04$a338.409415 COG =100 1\$aCogan, D. J. =245 10$aThe Irish services sector: a study of productive efficiency =260 \\$aDublin :$bthe Stationery Office,$c1978 =650 \0$aBooks =852 \\$bFreeman Library$h338.409415 COG