000 00273nam a2200109Ia 4500
008 220201s1977 xx 000 0 eng d
100 _aMarshall, WT & Nelson, H
245 0 _aStructures
260 _bEnglish Language & Macdonald Evana
_c1977
300 _a455
942 _2ddc
999 _c81252
_d81252