| Beskrivelse | Correspondents include Charles E Haines; Alvin Hansen (mentions Dartington redwood trees); Daisy Harriman (1925); Rev Cyril Harris; Reginald Harris, Long Island Biological Association; Jason Harrison; Alfred C Wolf; D Spencer Hatch; Joel B Hayden; Victor G Heiser; Leon Henderson; Mary Elliot Hobbs; Margery Melchers Holmquist and Fredrick M Holmquist; William J Hutchins, Berea College; others. |