HEDBERG, H.D. - Stratigraphy of the Rio Querecual section of northeastern Venezuela.

1937. Reprint Bull. Geol. Soc. Am. 48; pp. 1971-2024, 2 fig. 6 photoplts. h.t. 1 plt. h.t. with molluscs, 2 plts. h.t. with map and section folding-out. Orig. wrps. with libr. stamp, contents very good.

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