00433ntaaa2200169 45000030003000000050017000030080021000200400037000410820017000781000020000952450039001152500010001542600058001643000010002226500013002327000018002450120251027202659.00714s1973 ag 01 aAR-BaBNbspacAR-BaBNeaacrdRIC a428.2800 B63 aBoggs, Ralph S aEnglish step by step with pictures a1 ed. as.l. : bLatin American Institute Press Inc., cc1956 a207 p ainglés aDixson, R.J.