00439cam a22001814a 4500003001000000005001700010008004100027040002500068041000800093044000800101080001000109100001700119245002900136250001300165260003000178650003000208655001900238AR-SsjUIB20250710155142.0250429s1942 xxk 000 0 eng d aAR-SsjUIBcAR-SsjUIB0 aeng axxk a550.81 aBlyth, F.G.H12aA geology for engineers. a2nd ed. aLondon :bArnolds,c1942. 7aGeología practica2lemb 7aLibro2unescot