Kuvaus
Julkaistu:Began with: No. 136 ([March 1923]); ceased with no. 417 (June 1938)
Huomautukset:Each issue also has a distinctive title.
Some numbers constitute the Extension Service's Annual report.
Ulkoasu:1 online resource (282 volumes) : illustrations.
Julkaisutiheys:Irregular.
ISSN:2473-5914