Una explosión en América : el Canal de Panamá / selección, prólogo y notas de Enrique Jaramillo Levi

La explosión demográfica en América Latina / Profesor Moisés Poblete Troncoso

Explosión demográfica y crecimiento económico : una relación crítica / D. F. Maza Zavala

A explosão demográfica e seus problemas / Urania Hauer/ Philip M. Hauser ; tradução de M. Do Vale

Explorations of the upper Usumatsintla and adjacent region : Altar de Sacrificios, Seibal, Itsimté-Sácluk, Cankuen : reports of explorations for the Museum / by Teobert Maler

Exploratory fishing trips of the chartered trawler “Carmelina” in the western part of Venezuela (Gulf of Venezuela and Lake Maracaibo). Cruceros de pesca exploratoria del arrastrero “Carmelina” en la zona occidental de Venezuela

Explosao demográfica e crescimento do Brasil

Explorations in the department of Peten, Guatemala and adjacent region : Topoxté, YÕaxhá, Benque Viejo, Naranjo : reports of explorations for the Museum / by Teobert Maler

Explorations in the department of Peten, Guatemala, Tikal / by Teobert Maler. Preliminary study of the ruins of Tikal, Guatemala / by Alfred M. Tozzer Preliminary study of the prehistoric ruins of Tikal, Guatemala

Explorations in the Department of Peten, Guatemala, and adjacent region : Motul de San José, Peten-Itza : reports of explorations for the Museum / by Teobert Maler