1. Abercrombie, M., 1937, The behaviour of epiblast grafts beneath the primitive streak of the chick, J. Exp. Biol. 14: 302–318.
2. Abercrombie, M., Heaysman, J. E. M., and Pegrum, S. M., 1970, The locomotion of fibroblasts in culture. II. “Ruffling,” Exp. Cell Res. 60: 437–444.
3. Abrahamsohn, P. A., Lash, J. W., Kosher, R. A., and Minor, R. R., 1975, The ubiquitous occurrence of chondroitin sulfates in chick embryos, J. Exp. Zool. 194: 511–518.
4. Armstrong, P. B., and Armstrong, M. T., 1973, Are cells in solid tissues immobile? Mesonephric mesenchyme studied in vitro, Dev. Biol. 35: 187–209.
5. Augustine, J. M., 1970, Expansion of the area vasculosa of the chick after removal of the ectoderm, J. Embryol. Exp. Morphol. 24: 95–108.