The usefulness of employing samples of emission-line galaxies as alternative means of conducting redshift surveys is discussed. Results in the directions of the Bootes and Coma voids show certain differences. In Bootes approximately ten objects have been identified within the void, but the Coma void appears empty at the same luminosities. The Coma void shows little evidence of having a bubble-like structure; it appears more spongelike. There is a large void behind the Coma/A1367 supercluster that is probably related to the Bootes void.