00913nam a22002417a 4500710003100000001001100031003000400042005001700046008003300063035001900096040002300115086001800138245009700156260004400253300004700297336002600344337002800370338002700398500013700425504005400562650003300616651002200649  aGeological Survey (U.S.)  0000983131OSt20200624062631.0750722s1967 dcuab b f000 0 eng d  a(OCoLC)1466436  aMSCbengcMSCdOCL  aI 19.3:1254-B10aCretaceous and Lower Tertiary Stratigraphy in west-central Puerto Ricocby. Peter H. Mattson  aWashingtonbU.S. Govt. Print. Offc1967  aiii, 35 pagesbillustrations, mapsc24 cm.  2rdacontentaTextbtxt  2rdamediaaunmediatedbn  2rdacarrieravolumebnc  aPrepared in cooperation with the commonwealth of Puerto Rico Economic Development Administration, Industrial Research Department."    aIncludes bibliographical references (pages 34-35) 02fastaGeology, Stratigraphic 02fastaPuerto Rico