THE EXTENDED NARROW LINE REGION OF NGC4151 .1. EMISSION-LINE RATIOS AND THEIR IMPLICATIONS
MV PENSTON,A ROBINSON,D ALLOIN, I APPENZELLER,I ARETXAGA,DJ AXON, T BARIBAUD,P BARTHEL,SA BAUM,C BOISSON,AG DEBRUYN,J CLAVEL,L COLINA, M DENNEFELD,A DIAZ,M DIETRICH,F DURRET,JE DYSON,P GONDHALEKAR,E VANGRONINGEN, P JABLONKA,N JACKSON,W KOLLATSCHNY,E LAURIKAINEN,A LAWRENCE, J MASEGOSA, I MCHARDY, EJA MEURS, G MILEY,M MOLES, P OBRIEN,C ODEA,A DELOLMO, A PEDLAR,J PEREA,E PEREZ,I PEREZFOURNON, J PERRY, G PILBRATT,M REES, I ROBSON, P RODRIGUEZPASCUAL, JM RODRIGUEZ, ESPINOSA,M SANTOSLLEO, R SCHILIZZI,G STASINSKA,GM STIRPE,C TADHUNTER,E TERLEVICH,R TERLEVICH,S UNGER, V VILAVILARO,J VILCHEZ,SJ WAGNER,MJ WARD, GJ YATES ASTRONOMY & ASTROPHYSICS（1990）
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