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13. [Not Available]. Riba R Rev Soc Mex Hist Nat; 1969; 30():25-37. PubMed ID: 11626630 [No Abstract] [Full Text] [Related]
14. [Not Available]. Verdoorn F Jaarb K Ned Bot Ver; 1970; ():29-84. PubMed ID: 11632405 [No Abstract] [Full Text] [Related]
15. History of botany in the tropics: retrospect and prospect. Richards PW Taxon; 1970; 19():705-6. PubMed ID: 11633352 [No Abstract] [Full Text] [Related]
16. [Not Available]. Legros E Enquetes Mus Vie Wallonne; 1982-1983; 15(173-176):129-61. PubMed ID: 11634907 [No Abstract] [Full Text] [Related]