1. ABO EL-NIL MM. 1980. Embryogenesis of gymnosperm forest trees. US Pat. 4,217,730, August 19, 11 claims, 6 pp.
2. ATKINSON DE. 1977. Cellular energy metabolism and its regulation. New York, Academic Press.
3. BALL EA. 1978. Cloning in vitro of Sequoia sempervirens. Abstract 1726 In: Frontiers of Plant Tissue Culture, TA Thorpe, ed., University of Calgary, Calgary, Canada.
4. BANDURSKI RS, SCHULZE A. 1977. Concentration of indole3-acetic acid and its derivatives in plants. Plant Physiol. 60: 211–213.
5. BANERJEE SN, RADFORTH NW. 1969. In vitro studies on the developing embryos of Pinus resinosa. Bot. Mag. Tokyo 82: 329–340.