00382nam a2200145   4500020001500000020001500015082002000030100002000050245006200070260002800132300003200160650001400192650001400206700001600220  a0574516611  a0574416617  a531.4 H251 19841 aHanson, Bernice1 aFriction and machines /cBernice Hanson [and] Peggy Lahs.  aChicago :bSRA,cc1984.  a50 p. :bsome ill. ; 28 cm.14aFriction.24aMachines.1 aLahs, Peggy