World population and food supplies, 1980 /A symposium sponsored by the American Society of Agronomy
Wisconsin American Society of Agronomy , 1965
 Buku Teks
The Cultural library : volume 7, great events in world history
Parents' Magazine's Cultural Institute, 1965
 Buku Referensi
RECORD
The Library Association,
 Majalah, Jurnal, Buletin
SCI Science Citation Index 1980 annual : part 1 citaion index A-Coat
Institute fo Scientific Information, 1981
 Buku Referensi
SCI Science Citation Index 1980 annual : part 2 citaion index Coat-Gree
Institute fo Scientific Information, 1981
 Buku Referensi
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