Soil Survey Of The Lower Salinas Valley, California (1901) Lapham (u.

Soil Survey Of The Ventura Area, California (1901) J. Garnett Holmes

I. P. Martini | Archaeological Survey In The Lower Liri Valley,

Julia Noyes Stickney | In The Valley Of The Merrimack (1901) |

Geological Survey Of California | The Yosemite Guide-book |

Anthony Young (u. A.) | Tropical Soils & Soil Survey | Taschenbuch |

U. S. Department Of Agriculture | Soil Survey Manual (u.s. Department

The Geological Survey Of California An Address (1861) Josiah Dwight

Exploration And Survey Of The Valley Of The Great Salt Lake Of Utah |

Ordnance Survey | Kelso, Coldstream And Lower Tweed Valley |

Resources Of The Southern San Joaquin Valley, California | Anonymous |

Margaret E. Clovis (u. A.) | Salinas Valley | Buch | Englisch (2005)

Ordnance Survey | Lower Tamar Valley And Plymouth | (land-)karte |

Ordnance Survey | Lower Wharfedale And Washburn Valley | (land-)karte

An Account Of The Mammals And Birds Of The Lower Colorado Valley |

The Coleoptera Of The Lower Rio Grande Valley The Ferns Of Nicaragua