00819cam a22002291  4500001001300000003000400013005001700017008004100034010001700075035002000092040004600112042001200158050001600170051002200186100004000208245011500248260006200363300004200425490008400467650002100551999001700572gs 31000158 DLC20260227111335.0900515s1929    pauf          000 0 eng c  ags 31000158   a(OCoLC)21537997  aLibrary, U.S. Geological SurveycTxUdDLC  apremarc00aQD935b.H62  aTN863b.P37 no. 31 aHoness, Arthur Pharoah,d1887-1942.14aThe theory of crystal etching and its significance in the classification of crystals,cby Arthur P. Honess ...  aState College, Pa.,bSchool of mineral industries,c1929.  a1 p. l., 8 p. III pl. on 2 l.c23 cm.0 aPennsylvania. State College. Mineral Industries Experiment Station. Bulletinv3 0aCrystallography.  c26879d26879