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The land of corn and honey : the keeping of stingless bees (meliponiculture) in the ethno-ecological environment of Yucatan (Mexico) and El Salvador / door Harriet J. de Jong.
- s.n.],
- 1999.
- [S.l. :
-
Resume of Pakistan's views on Geneva talks : full text of Minister Zafrullah Khan's letter to Dr. Frank P. Graham
- s.n.],
- 1952.
- [S.l. :
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Selected papers and monographs on Senegalese agriculture / comp. by Douglas H. Graham.
- 862.22
- s.n.,
- ca. 1984].
- [S.l. :