Trevor Clarke, Joseph Grows Cocoa, revised by Colin Benton & Jane Belfield (CQIP, Rabaul), drawings by Blasius Offele, Mar 1993
E.S.C. Smith (AES, Keravat), Bibliography of Cocoa in Papua New Guinea, PNG Dept of Primary Industry, Sep 1982
J.E. Moxon, LAES Bulletins in Simple English (Pests in Cocoa), n.d.
C. Prior, J. O’Donohue, R. Rotscheid & E. Sitapai, Black Pod Canker and Seedling Blight Diseases in Cocoa: an illustrated guide for growers [in English, Tok Pisin and Motu], 1981
John Perkins and Trevor Clarke, An Alternative Policy for Cocoa in Papua New Guinea: a discussion paper, Rabaul, Aug 1980
John Perkins and Trevor Clarke, Narapela pasin long ronim bisnis kakau insait long Papua Niugini, Rabaul, Aug 1980 with An Alternative Cocoa Policy for Papua New Guinea
P. Bleeker and D.F. Freyne, A Preliminary Inventory of Areas Suitable for Cocoa Production in Papua New Guinea, 1981
J.E. Moxon, Review of Research requirements for Cocoa in Papua New Guinea: Report to the Government and Cocoa Board of PNG, compiled by the Cocoa Research Group of PNG, LAES, Keravat, July 1983
J. Wylik & R. Sims, Commercial Agricultural Production in PNG, n.d., c.1983
G. Anthony, G.Y. Kauzi, D.W. Loh & J.R. Anderson, Returns to Cocoa Research 1965 to 1980 in Papua New Guinea, ACIAR Project Papers No.9, Sep 1988
