Autor
Teilhard de Chardin, Pierre, 1881-1955
2
Besteiro, Julián, 1870-1940,
1
Bonfanti, Ana P. de,
1
Castro, Carmen,
1
Ducrocq, Albert, 1921-
1
Hawking, Stephen, 1942-2018,
1
Jacot, Louis
1
L-ngdon Davies, John, 1897-
1
Ortuño, Miguel,
1
Paula León Olea, Francisco de
1
Pearson, Karl, 1857-1936
1
Sagan, Carl, 1934-1996,
1
Stephens, Gwenda, tr
1