Asa Gray correspondence. Senders Ra-Ri

By: Gray, Asa, - Radlkofer, L. (Ludwig), - Rand, Edward L. (Edward Lothrop), - Rattan, Volney, - Ravenel, Henry William, - Redfield, John Howard, - Reeve, Lovell, - Regel, E. (Eduard), - Reichenbach, H. G. (Heinrich Gustav) - Reinsch, Paul Fried