01111nam a22002897a 4500 Geological Survey (U.S.) 227708 257218 257218 0000983131 OSt 20200624062631.0 750722s1967 dcuab b f000 0 eng d (OCoLC)1466436 MSC eng MSC OCL Biblioteca Encarnacion Valdes I 19.3:1254-B I 19.3:1254-B Cretaceous and Lower Tertiary Stratigraphy in west-central Puerto Rico by. Peter H. Mattson Washington U.S. Govt. Print. Off 1967 iii, 35 pages illustrations, maps 24 cm. rdacontent Text txt rdamedia unmediated n rdacarrier volume nc Prepared in cooperation with the commonwealth of Puerto Rico Economic Development Administration, Industrial Research Department." Includes bibliographical references (pages 34-35) fast 101970 Geology, Stratigraphic fast 294023 Puerto Rico ddc 6 I 19.3: 1254-B 0 0 0 ddc 0 0 10 10 5 2017-02-09 0 I 19.3:1254-B I 19.3:1254-B 2017-02-09 00:00:00 2017-02-09 6