This page is from the Vol 3 No 5 Doll Talk (Kimport) and reads "Balata sap, kin to raw ruber and to chicle is the stuff which they manipulated into form. Aboriginal Indians and the Hindoos who came to set the teac industry a hundred years ago are the types they produce. Beads, feathers, a baby in a fiber carrier and a bow for father mark the Aborigines" turban and sari as their ancestors wear in India mark the tea folk."
Both kinds of dolls are advertised but only the Aborigines are included in the photos.
About the country. The name changed in the mid60s from British Guiana:
A history of British Guiana: Fulltext
Book review includes reference to dolls in India: