Eckholm, Erik P.
Losing ground : environmental stress and world food prospects
W.W. Norton, 1976
 Buku Teks SO
Reaching for the skies
Academy Group, 1995
 Buku Referensi
Chukovsky, Nikolai
Baltic skies = Балтийское Небо = Baltijskoe nebo
Foreign Languages Publishing House , [Date of publication not identified]
 Buku Teks SO
Fish, Donald
Lawless skies the fight against international air crime
G.P. Putnam's Sons , 1962
 Buku Teks
Carr, Herman Y.
Physics fron the ground up
McGraw-Hill, 1971
 Buku Teks SO