COMMENT ⊗ VALID 00002 PAGES C REC PAGE DESCRIPTION C00001 00001 C00002 00002 R XIPI∂0,∂+150X1.2,1.2≡?p↔ C00003 ENDMK C⊗; R XIP;I∂0,∂+150;X1.2,1.2;≡⊗?p↔