00494nam a22001937a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093082001700102100002100119245003700140260006100177300001900238650002300257700002000280CHAP20220329134920.0971013c19571951        r     00010     d  a28000  a28972  a33083  cCHAP  a581.973bM2300aMcDougall, W. B.  aPlants of Big Bend National Park  aWashington :bGovernment Printing Office,c1957 (c.1951)  a209 p.b: ilus14aBotánicaxE.U.A.0 aSperry, Omer E.