Vasishta, P C Botany . : Gymnosperms. / by P C Vasishta , A K Sinha & Anil Kumar . - 1st rev. ed. rep. - new delhi: S. Chand & Company ltd., 2013. - 580p.: 20cm. Bibliography & Index. ISBN: 8121926181 Subjects--Index Terms: Gymnosperms conifers. Botany Dewey Class. No.: 585