This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the publi
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the publi
It has long been the custom among those making pollen surveys to expose microscope slides coated with a suitable adhesive and examine them for the pollen grains
